In presence of osmium(VIII), the reaction between L-tryptophan and diperiodatocuprate(III) DPC in alkaline medium exhibits 1:4 stochiometry (L-tryptophan:DPC). The reaction shows first-order dependence on [DPC] and [osmium(VIII)], less than unit order in both [L-tryptophan] and [alkali], and negative fractional order in [periodate]. The active species of catalyst and oxidant have been identified. The main products were identified by spectral studies and spot test. The probable mechanism was proposed and discussed.

Nagaraj P. Shetti

Ragunatharaddi R. Hosamani

Sharanappa T. Nandibewoor

Mechanistic Aspects of Osmium(VIII) Catalyzed Oxidation of L-Tryptophan by Diperiodatocuprate(III) in Aqueous Alkaline Medium: A Kinetic Model

The kinetics and mechanism of the reduction of chromium(VI) by lactic acid (Lac) in aqueous acidic medium was  studied with spectrophotometry in a temperature range of 298.15 K&#x7e;313.15 K. Under the conditions of the pseudo-first order <svg style="vertical-align:-3.25793pt;width:132.75px;" id="M1" height="14.75" version="1.1" viewBox="0 0 132.75 14.75" width="132.75"  xmlns="http://www.w3.org/2000/svg">
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				<tspan style="font-size: 12.50px; " x="0" y="0">(</tspan>
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				<tspan style="font-size: 12.50px; " x="27.068995" y="0">]</tspan>
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				<tspan style="font-size: 12.50px; " x="53.312794" y="0">]</tspan>
			</text>

			<text transform="matrix(1,0,0,-1,25.12,60.37)">
				<tspan style="font-size: 8.75px; " x="0" y="0">0</tspan>
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				<tspan style="font-size: 12.50px; " x="0" y="0">)</tspan>
			</text>

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</svg>, the observed rate constant <svg style="vertical-align:-3.22281pt;width:34.825001px;" id="M2" height="14.7125" version="1.1" viewBox="0 0 34.825001 14.7125" width="34.825001"  xmlns="http://www.w3.org/2000/svg">
	<g transform="matrix(1.25,0,0,-1.25,0,14.7125)">
		<g transform="translate(72,-60.23)">
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				<tspan style="font-size: 12.50px; " x="0" y="0">(</tspan>
				<tspan style="font-size: 12.50px; " x="4.1634989" y="0">𝑘</tspan>
			</text>

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				<tspan style="font-size: 8.75px; " x="4.3759999" y="0">b</tspan>
				<tspan style="font-size: 8.75px; " x="8.7519999" y="0">s</tspan>
			</text>

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				<tspan style="font-size: 12.50px; " x="0" y="0">)</tspan>
			</text>

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</svg> increased with the increase in [Lac] and <svg style="vertical-align:-1.95624pt;width:29.9375px;" id="M3" height="14.8" version="1.1" viewBox="0 0 29.9375 14.8" width="29.9375"  xmlns="http://www.w3.org/2000/svg">
	<g transform="matrix(1.25,0,0,-1.25,0,14.8)">
		<g transform="translate(72,-60.16)">
			<text transform="matrix(1,0,0,-1,-71.95,62.16)">
				<tspan style="font-size: 12.50px; " x="0" y="0">[</tspan>
				<tspan style="font-size: 12.50px; " x="4.1634989" y="0">H</tspan>
			</text>

			<text transform="matrix(1,0,0,-1,-58.76,67.16)">
				<tspan style="font-size: 8.75px; " x="0" y="0">+</tspan>
			</text>

			<text transform="matrix(1,0,0,-1,-52.27,62.16)">
				<tspan style="font-size: 12.50px; " x="0" y="0">]</tspan>
			</text>

		</g>
	</g>
</svg>. There is no salt effect. Based on the experimental results, a probable reaction mechanism of oxidation was proposed. The rate equation derived from the mechanism could explain all the experimental phenomena. Activation parameters along with rate constant of the rate-determining step have been evaluated.

Jinhuan Shan

Fang Wang

Changying Song

Heye Wang

Kinetic and Mechanistic Study of the Reduction of Chromium(VI) by Lactic Acid

The mean amplitudes of vibration of the interesting <svg style="vertical-align:-3.25793pt;width:30.8375px;" id="M2" height="14.5375" version="1.1" viewBox="0 0 30.8375 14.5375" width="30.8375"  xmlns="http://www.w3.org/2000/svg">
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				<tspan style="font-size: 12.50px; " x="0" y="0">I</tspan>
				<tspan style="font-size: 12.50px; " x="4.1634989" y="0">F</tspan>
			</text>

			<text transform="matrix(1,0,0,-1,-60.83,60.55)">
				<tspan style="font-size: 8.75px; " x="0" y="0">8</tspan>
				<tspan style="font-size: 8.75px; " x="6.9499998" y="-8.1199999">−</tspan>
			</text>

		</g>
	</g>
</svg> anion (<svg style="vertical-align:-3.22281pt;width:22.975px;" id="M3" height="14.4875" version="1.1" viewBox="0 0 22.975 14.4875" width="22.975"  xmlns="http://www.w3.org/2000/svg">
	<g transform="matrix(1.25,0,0,-1.25,0,14.4875)">
		<g transform="translate(72,-60.41)">
			<text transform="matrix(1,0,0,-1,-71.95,63.67)">
				<tspan style="font-size: 12.50px; " x="0" y="0">D</tspan>
			</text>

			<text transform="matrix(1,0,0,-1,-62.92,60.55)">
				<tspan style="font-size: 8.75px; " x="0" y="0">4</tspan>
			</text>

			<text transform="matrix(1,0,0,-1,-58.55,60.55)">
				<tspan style="font-size: 8.75px; " x="0" y="0">d</tspan>
			</text>

		</g>
	</g>
</svg>-symmetry), containing iodine (VII), were calculated from known spectroscopic and structural data in the temperature range between 0 and 1000&#x2009;K. The results are discussed in comparison with those of related species.

Enrique J. Baran

Mean Amplitudes of Vibration of the <svg style="vertical-align:-3.39069pt" height="15.8375" version="1.1" viewBox="0 0 31.6875 15.8375" width="31.6875" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(.017,-0,0,-.017,.062,11.55)"><path id="x49" d="M303 0h-265v28q62 5 76 19.5t14 77.5v400q0 63 -14 77.5t-76 19.5v28h265v-28q-62 -5 -76 -19.5t-14 -77.5v-400q0 -64 14 -78t76 -19v-28z" /></g><g transform="matrix(.017,-0,0,-.017,5.859,11.55)"><path id="x46" d="M493 503l-29 -4q-13 56 -28 80q-13 22 -35.5 29.5t-78.5 7.5h-76q-22 0 -27.5 -5t-5.5 -27v-238h103q66 0 82.5 12t25.5 62h29v-193h-29q-9 54 -25.5 67t-82.5 13h-103v-181q0 -64 15 -78.5t84 -19.5v-28h-272v28q61 5 74.5 19.5t13.5 78.5v399q0 64 -13 78t-72 19v28&#xA;h440q1 -40 10 -147z" /></g><g transform="matrix(.012,-0,0,-.012,14.85,15.637)"><path id="x38" d="M249 635q70 0 116 -43t46 -105q0 -46 -28 -80q-22 -25 -80 -64q62 -35 97 -75t35 -99q0 -81 -63 -131t-135 -50q-83 0 -137.5 45.5t-54.5 123.5q0 52 45 95q29 28 89 64q-109 62 -109 155q0 66 50.5 115t128.5 49zM238 603q-42 0 -67.5 -31t-25.5 -72q0 -50 32.5 -79.5&#xA;t98.5 -62.5q61 48 61 124q0 59 -29.5 90t-69.5 31zM248 20q46 0 76.5 33.5t30.5 89.5q0 50 -39 85.5t-110 71.5q-81 -54 -81 -137q0 -67 35.5 -105t87.5 -38z" /></g><g transform="matrix(.012,-0,0,-.012,24.013,3.4)"><path id="x2212" d="M535 230h-483v50h483v-50z" /></g></svg> Anion

The synthesis of novel nickel(II) complexes with new ligand derived from hydrazone of isoniazid has been reported. The complexes have general compositions <svg style="vertical-align:-3.13504pt;width:69.587502px;" id="M1" height="14.7125" version="1.1" viewBox="0 0 69.587502 14.7125" width="69.587502" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(1.25,0,0,-1.25,0,14.7125)"><g transform="translate(72,-60.23)"><text transform="matrix(1,0,0,-1,-71.95,63.41)"><tspan style="font-size: 12.50px; " x="0" y="0">[</tspan><tspan style="font-size: 12.50px; " x="4.1634989" y="0">N</tspan><tspan style="font-size: 12.50px; " x="13.190665" y="0">i</tspan><tspan style="font-size: 12.50px; " x="16.666498" y="0">(</tspan><tspan style="font-size: 12.50px; " x="20.829998" y="0">L</tspan><tspan style="font-size: 12.50px; " x="28.469332" y="0">)</tspan></text><text transform="matrix(1,0,0,-1,-39.32,60.28)"><tspan style="font-size: 8.75px; " x="0" y="0">2</tspan></text><text transform="matrix(1,0,0,-1,-34.44,63.41)"><tspan style="font-size: 12.50px; " x="0" y="0">X</tspan></text><text transform="matrix(1,0,0,-1,-25.42,60.28)"><tspan style="font-size: 8.75px; " x="0" y="0">2</tspan></text><text transform="matrix(1,0,0,-1,-20.54,63.41)"><tspan style="font-size: 12.50px; " x="0" y="0">]</tspan></text></g></g></svg> or <svg style="vertical-align:-3.57394pt;width:100.8625px;" id="M2" height="15.25" version="1.1" viewBox="0 0 100.8625 15.25" width="100.8625" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(1.25,0,0,-1.25,0,15.25)"><g transform="translate(72,-59.8)"><text transform="matrix(1,0,0,-1,-71.95,63.41)"><tspan style="font-size: 12.50px; " x="0" y="0">[</tspan><tspan style="font-size: 12.50px; " x="4.1634989" y="0">N</tspan><tspan style="font-size: 12.50px; " x="13.190665" y="0">i</tspan><tspan style="font-size: 12.50px; " x="16.666498" y="0">(</tspan><tspan style="font-size: 12.50px; " x="20.829998" y="0">L</tspan><tspan style="font-size: 12.50px; " x="28.469332" y="0">)</tspan></text><text transform="matrix(1,0,0,-1,-39.32,60.28)"><tspan style="font-size: 8.75px; " x="0" y="0">3</tspan></text><text transform="matrix(1,0,0,-1,-34.44,63.41)"><tspan style="font-size: 12.50px; " x="0" y="0">]</tspan><tspan style="font-size: 12.50px; " x="4.1634989" y="0">(</tspan><tspan style="font-size: 12.50px; " x="8.3269978" y="0">C</tspan><tspan style="font-size: 12.50px; " x="16.666498" y="0">l</tspan><tspan style="font-size: 12.50px; " x="20.142332" y="0">O</tspan></text><text transform="matrix(1,0,0,-1,-5.27,60.28)"><tspan style="font-size: 8.75px; " x="0" y="0">4</tspan></text><text transform="matrix(1,0,0,-1,-0.4,63.41)"><tspan style="font-size: 12.50px; " x="0" y="0">)</tspan></text><text transform="matrix(1,0,0,-1,3.76,59.85)"><tspan style="font-size: 8.75px; " x="0" y="0">2</tspan></text></g></g></svg>, where L = N-isonicotinamido-furfuraldimine (INH-FFL) and <svg style="vertical-align:-0.17554pt;width:53.6875px;" id="M3" height="11.0125" version="1.1" viewBox="0 0 53.6875 11.0125" width="53.6875" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(1.25,0,0,-1.25,0,11.0125)"><g transform="translate(72,-63.19)"><text transform="matrix(1,0,0,-1,-71.95,63.41)"><tspan style="font-size: 12.50px; " x="0" y="0">X</tspan><tspan style="font-size: 12.50px; " x="12.490497" y="0">=</tspan><tspan style="font-size: 12.50px; " x="24.530886" y="0">C</tspan><tspan style="font-size: 12.50px; " x="32.870388" y="0">l</tspan></text><text transform="matrix(1,0,0,-1,-35.6,68.67)"><tspan style="font-size: 8.75px; " x="0" y="0">−</tspan></text></g></g></svg> or <svg style="vertical-align:-0.17554pt;width:38.487499px;" id="M4" height="10.9125" version="1.1" viewBox="0 0 38.487499 10.9125" width="38.487499" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(1.25,0,0,-1.25,0,10.9125)"><g transform="translate(72,-63.27)"><text transform="matrix(1,0,0,-1,-71.95,63.5)"><tspan style="font-size: 12.50px; " x="0" y="0">N</tspan><tspan style="font-size: 12.50px; " x="8.9021358" y="0">C</tspan><tspan style="font-size: 12.50px; " x="17.241636" y="0">S</tspan></text><text transform="matrix(1,0,0,-1,-47.76,68.67)"><tspan style="font-size: 8.75px; " x="0" y="0">−</tspan></text></g></g></svg>. The ligand hydrazone behaves as neutral bidentate (N and O donor) through the carbonyl oxygen and azomethine nitrogen. On the basis of elemental analysis, molecular weight determinations, magnetic susceptibility/moment, thermogravimetric, electrochemical, and spectroscopic studies, the new complexes have been characterized with octahedral geometry. The antibacterial and antifungal studies of the present complexes show that they are moderate antibacterial and antifungal agents.

Surendra Prasad

Ram K. Agarwal

Nickel(II) Complexes of Hydrazone of Isoniazid and Their Magneto-Spectral, Electrochemical, Thermal and Antimicrobial Investigations

Reaction of <svg style="vertical-align:-3.25793pt;width:52.099998px;" id="M1" height="14.75" version="1.1" viewBox="0 0 52.099998 14.75" width="52.099998"  xmlns="http://www.w3.org/2000/svg">
	<g transform="matrix(1.25,0,0,-1.25,0,14.75)">
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				<tspan style="font-size: 12.50px; " x="0" y="0">M</tspan>
				<tspan style="font-size: 12.50px; " x="11.115167" y="0">(</tspan>
				<tspan style="font-size: 12.50px; " x="15.278666" y="0">C</tspan>
				<tspan style="font-size: 12.50px; " x="23.518143" y="0">O</tspan>
				<tspan style="font-size: 12.50px; " x="32.545307" y="0">)</tspan>
			</text>

			<text transform="matrix(1,0,0,-1,-35.24,60.37)">
				<tspan style="font-size: 8.75px; " x="0" y="0">6</tspan>
			</text>

		</g>
	</g>
</svg>; M = Mo or W with isatin in the presence of triphenylphosphine in THF under reduced pressure gave the tricarbonyl derivatives complexes <svg style="vertical-align:-3.25793pt;width:147.6375px;" id="M2" height="14.8625" version="1.1" viewBox="0 0 147.6375 14.8625" width="147.6375"  xmlns="http://www.w3.org/2000/svg">
	<g transform="matrix(1.25,0,0,-1.25,0,14.8625)">
		<g transform="translate(72,-60.11)">
			<text transform="matrix(1,0,0,-1,-71.95,63.41)">
				<tspan style="font-size: 12.50px; " x="0" y="0">[</tspan>
				<tspan style="font-size: 12.50px; " x="4.1634989" y="0">M</tspan>
				<tspan style="font-size: 12.50px; " x="15.278666" y="0">(</tspan>
				<tspan style="font-size: 12.50px; " x="19.442165" y="0">C</tspan>
				<tspan style="font-size: 12.50px; " x="27.681643" y="0">O</tspan>
				<tspan style="font-size: 12.50px; " x="36.708809" y="0">)</tspan>
			</text>

			<text transform="matrix(1,0,0,-1,-31.08,60.28)">
				<tspan style="font-size: 8.75px; " x="0" y="0">3</tspan>
			</text>

			<text transform="matrix(1,0,0,-1,-26.2,63.41)">
				<tspan style="font-size: 12.50px; " x="0" y="0">(</tspan>
				<tspan style="font-size: 12.50px; " x="4.1634989" y="0">i</tspan>
				<tspan style="font-size: 12.50px; " x="7.6393328" y="0">s</tspan>
				<tspan style="font-size: 12.50px; " x="12.503" y="0">a</tspan>
				<tspan style="font-size: 12.50px; " x="18.054333" y="0">t</tspan>
				<tspan style="font-size: 12.50px; " x="21.530167" y="0">H</tspan>
				<tspan style="font-size: 12.50px; " x="30.557331" y="0">)</tspan>
				<tspan style="font-size: 12.50px; " x="34.720833" y="0">(</tspan>
				<tspan style="font-size: 12.50px; " x="38.884331" y="0">P</tspan>
				<tspan style="font-size: 12.50px; " x="45.848499" y="0">P</tspan>
				<tspan style="font-size: 12.50px; " x="52.812672" y="0">h</tspan>
			</text>

			<text transform="matrix(1,0,0,-1,32.86,60.28)">
				<tspan style="font-size: 8.75px; " x="0" y="0">3</tspan>
			</text>

			<text transform="matrix(1,0,0,-1,37.74,63.41)">
				<tspan style="font-size: 12.50px; " x="0" y="0">)</tspan>
				<tspan style="font-size: 12.50px; " x="4.1634989" y="0">]</tspan>
			</text>

		</g>
	</g>
</svg>. The two complexes were characterized by elemental analysis, infrared, mass and <svg style="vertical-align:-0.0pt;width:17.5px;" id="M3" height="13.775" version="1.1" viewBox="0 0 17.5 13.775" width="17.5"  xmlns="http://www.w3.org/2000/svg">
	<g transform="matrix(1.25,0,0,-1.25,0,13.775)">
		<g transform="translate(72,-60.98)">
			<text transform="matrix(1,0,0,-1,-71.95,66.03)">
				<tspan style="font-size: 8.75px; " x="0" y="0">1</tspan>
			</text>

			<text transform="matrix(1,0,0,-1,-67.08,61.03)">
				<tspan style="font-size: 12.50px; " x="0" y="0">H</tspan>
			</text>

		</g>
	</g>
</svg> NMR spectroscopy. The spectroscopic studies show that the two complexes exist in <i  >fac</i>- and <i  >mer</i>-isomers in solutions through exchange the CO group and <svg style="vertical-align:-3.25793pt;width:31.4375px;" id="M4" height="14.8625" version="1.1" viewBox="0 0 31.4375 14.8625" width="31.4375"  xmlns="http://www.w3.org/2000/svg">
	<g transform="matrix(1.25,0,0,-1.25,0,14.8625)">
		<g transform="translate(72,-60.11)">
			<text transform="matrix(1,0,0,-1,-71.95,63.41)">
				<tspan style="font-size: 12.50px; " x="0" y="0">P</tspan>
				<tspan style="font-size: 12.50px; " x="6.9641709" y="0">P</tspan>
				<tspan style="font-size: 12.50px; " x="13.928342" y="0">h</tspan>
			</text>

			<text transform="matrix(1,0,0,-1,-51.77,60.28)">
				<tspan style="font-size: 8.75px; " x="0" y="0">3</tspan>
			</text>

		</g>
	</g>
</svg>. The Uv-Vis spectra of the complexes in different solvents were  studied.

M. M. H. Khalil

F. A. Al-Seif

Molybdenum and Tungsten Tricarbonyl Complexes of Isatin with Triphenylphosphine

Boehmite nanofibers of high quality were synthesized through a wet-gel conversion process without the use of a surfactant. The long nanofibers of boehmite with clear-cut edges were obtained by steaming the wet-gel precipitate at <svg style="vertical-align:-0.17555pt;width:38.450001px;" id="M1" height="11.0375" version="1.1" viewBox="0 0 38.450001 11.0375" width="38.450001"  xmlns="http://www.w3.org/2000/svg">
	<g transform="matrix(1.25,0,0,-1.25,0,11.0375)">
		<g transform="translate(72,-63.17)">
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				<tspan style="font-size: 12.50px; " x="0" y="0">1</tspan>
				<tspan style="font-size: 12.50px; " x="6.2515001" y="0">7</tspan>
				<tspan style="font-size: 12.50px; " x="12.503" y="0">0</tspan>
			</text>

			<text transform="matrix(1,0,0,-1,-53.2,68.56)">
				<tspan style="font-size: 8.75px; " x="0" y="0">∘</tspan>
			</text>

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</svg> for 2 days. Analytical techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared emission spectroscopy (IES), as well as Raman spectroscopy were used to characterize the products.

Jing Yang

Ray L. Frost

Synthesis and Characterization of Boehmite Nanofibers

Kinetics and mechanism of oxidation of leucine and alanine by Ag(III) complex were studied spectrophotometrically in alkaline medium at constant ion strength. The reaction was in first order with respect to Ag(III) complex and amino acids (leucine, alanine). The second-order rate constant, <svg style="vertical-align:-0.13794pt;width:16.7125px;" id="M1" height="10.7375" version="1.1" viewBox="0 0 16.7125 10.7375" width="16.7125" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(1.25,0,0,-1.25,0,10.7375)"><g transform="translate(72,-63.41)"><text transform="matrix(1,0,0,-1,-71.95,63.6)"><tspan style="font-size: 12.50px; " x="0" y="0">𝑘</tspan></text><text transform="matrix(1,0,0,-1,-65.17,68.67)"><tspan style="font-size: 8.75px; " x="0" y="0">−</tspan></text></g></g></svg>, decreased with the increasing in <svg style="vertical-align:-1.95624pt;width:41.212502px;" id="M2" height="13.125" version="1.1" viewBox="0 0 41.212502 13.125" width="41.212502" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(1.25,0,0,-1.25,0,13.125)"><g transform="translate(72,-61.5)"><text transform="matrix(1,0,0,-1,-71.95,63.5)"><tspan style="font-size: 12.50px; " x="0" y="0">[</tspan><tspan style="font-size: 12.50px; " x="4.1634989" y="0">O</tspan><tspan style="font-size: 12.50px; " x="13.190665" y="0">H</tspan></text><text transform="matrix(1,0,0,-1,-49.73,68.67)"><tspan style="font-size: 8.75px; " x="0" y="0">−</tspan></text><text transform="matrix(1,0,0,-1,-43.24,63.5)"><tspan style="font-size: 12.50px; " x="0" y="0">]</tspan></text></g></g></svg> and <svg style="vertical-align:-3.13504pt;width:41.237499px;" id="M3" height="14.6" version="1.1" viewBox="0 0 41.237499 14.6" width="41.237499" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(1.25,0,0,-1.25,0,14.6)"><g transform="translate(72,-60.32)"><text transform="matrix(1,0,0,-1,-71.95,63.5)"><tspan style="font-size: 12.50px; " x="0" y="0">[</tspan><tspan style="font-size: 12.50px; " x="4.1634989" y="0">I</tspan><tspan style="font-size: 12.50px; " x="8.3269978" y="0">O</tspan></text><text transform="matrix(1,0,0,-1,-54.6,60.37)"><tspan style="font-size: 8.75px; " x="0" y="0">4</tspan><tspan style="font-size: 8.75px; " x="4.8800001" y="-8.3000002">−</tspan></text><text transform="matrix(1,0,0,-1,-43.23,63.5)"><tspan style="font-size: 12.50px; " x="0" y="0">]</tspan></text></g></g></svg>. A plausible mechanism was proposed from the kinetics study, and the rate equations derived from mechanism can explain all experimental phenomena. The activation parameters were calculated at 298.2 K. 

Lei Chen

Kinetics and Mechanism of Oxidation of Leucine and Alanine by Ag(III) Complex in Alkaline Medium

An alkynyl-coupled diferrocenylpropane and azobenzene derivative has been synthesized. Photoinduced change of UV-absorbance and shifts of redox potential of synthesized compound were elucidated by time-dependent density function theory (TD-DFT) calculations, indicating that isomerization of trans to cis configuration occurs by UV irradiation.

Limin Han

Jianchen Bai

Quanling Suo

Meihua Luo

Lifeng Zhang

Photoinduced Change of UV-Absorption and Redox Potential of Alkyne-Bridged Diferrocenyl Azobenzene Derivative

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International Journal of Inorganic Chemistry - Table of contents 2008

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International Journal of Inorganic Chemistry

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International Journal of Inorganic Chemistry