Synthesis, Spectral Characterization, Magnetic Moment, Mass, X-Ray Diffraction, and Kinetic (TGA) Studies of Cr(III) Complex with Metformin: An Oral Antidiabetic Drug

Table 4

Thermogravimetric data of metformin-chromium complex by Sharp-Wentworth method.

Temp. (°C)	°K temp. (T)	1000/𝑇	% Mass Loss	Change in Wt. “𝑐” grams	1−𝑐	d𝑐/d𝑡	log(d𝑐/d𝑡)	log(1−𝑐)	log(d𝑐/d𝑡)/1−𝑐	Weight %
30	303	3.300330033	1.701	0.000232118	0.999767882	0.000545287	−3.263374588	−0.000100819	−3.264132253	98.299
50	323	3.095975232	4.081	0.000556893	0.999443107	0.001106411	−2.956083571	−0.000241923	−2.957730712	95.919
70	343	2.915451895	8.312	0.001134256	0.998865744	0.001929735	−2.714502226	−0.00049288	−2.717584662	91.688
90	363	2.754820937	14.557	0.001986448	0.998013552	0.002657443	−2.575536122	−0.000863561	−2.580662475	85.443
110	383	2.610966057	20.202	0.002756765	0.997243235	0.003103906	−2.508091508	−0.001198901	−2.51502484	79.798
130	403	2.481389578	23.756	0.003241744	0.996758256	0.003448099	−2.462420327	−0.001410158	−2.470428825	76.244
150	423	2.364066194	26.456	0.003610186	0.996389814	0.003715424	−2.429991652	−0.001570721	−2.438796159	73.544
170	443	2.257336343	28.55	0.003895933	0.996104067	0.003932163	−2.405368473	−0.001695287	−2.41477628	71.45
190	463	2.159827214	30.243	0.00412696	0.99587304	0.004132807	−2.383754866	−0.001796024	−2.393633294	69.757
210	483	2.070393375	31.798	0.004339155	0.995660845	0.004332892	−2.363222179	−0.001888571	−2.373521256	68.202
230	503	1.988071571	33.342	0.004549849	0.995450151	0.004535507	−2.343374123	−0.001980483	−2.354084854	66.658
250	523	1.912045889	34.904	0.004763	0.995237	0.004744687	−2.32379244	−0.002073486	−2.334913634	65.096
270	543	1.841620626	36.515	0.004982837	0.995017163	0.004956671	−2.304809933	−0.002169428	−2.316351937	63.485
290	563	1.776198934	38.149	0.005205813	0.994794187	0.005163585	−2.28704867	−0.002266761	−2.299016921	61.851
310	583	1.715265866	39.747	0.005423876	0.994576124	0.005363513	−2.2705507	−0.002361971	−2.282933045	60.253
330	603	1.658374793	41.292	0.005634706	0.994365294	0.005566258	−2.254436669	−0.002454042	−2.267211741	58.708
350	623	1.605136437	42.855	0.005847993	0.994152007	0.005764514	−2.23923731	−0.002547207	−2.252409385	57.145
370	643	1.555209953	44.386	0.006056914	0.993943086	0.005941837	−2.226079278	−0.002638483	−2.239644612	55.614
390	663	1.508295626	45.762	0.006244683	0.993755317	0.006086785	−2.215612063	−0.002720534	−2.2295348	54.238
410	683	1.464128843	46.893	0.006399019	0.993600981	0.006210342	−2.206884458	−0.002787988	−2.221097301	53.107
430	703	1.422475107	47.855	0.006530293	0.993469707	0.006333143	−2.198380725	−0.002845371	−2.212831162	52.145
450	723	1.383125864	48.803	0.006659657	0.993340343	0.006517309	−2.185931679	−0.002901926	−2.200586833	51.197
470	743	1.34589502	50.2	0.006850292	0.993149708	0.006701005	−2.173860074	−0.002985281	−2.188854365	49.8
490	763	1.31061599	51.616	0.007043519	0.992956481	0.006875974	−2.162665789	−0.003069785	−2.17800662	48.384
510	783	1.277139208	52.969	0.00722815	0.99277185	0.007047142	−2.151986954	−0.003150546	−2.16765509	47.031
530	803	1.245330012	54.291	0.00740855	0.99259145	−0.000370427	#NUM!	−0.00322947	#NUM!	45.709