Research Article

Alkylation and 1,3-Dipolar Cycloaddition of 6-Styryl-4,5-dihydro-2H-pyridazin-3-one: Synthesis of Novel N-Substituted Pyridazinones and Triazolo[4,3-b]pyridazinones

Table 1

Crystal data and structure refinement parameters of compound 4a.

Chemical Formula: C12H12N2O
Formula weight: 200.24
Crystal system: monoclinicSpace group (no): (14)
= 8.0348 (6) Å = 101.074 (2)°
= 11.1532 (6) Å = 1911.5 (3) Å3
= 11.9941 (8) Å = 4
= 1.261 Mg m−3Mo radiation, = 0.71073 Å
= 0.08 mm−1F(000) = 424
Crystal sizes = 0.34 * 0.25 * 0.23 mm3Crystal: Prism, colourless
No. of reflections collected = 11692
No. of independent reflections = 2431No. of reflections with I > 2 (I) = 1647
θ range for data collection: = 27.5°, = 2.5°
Goodness-of-ft on F2 = 1.07
R indices [I > 2s(I)]: R1 = 0.054, 2 = 0.179
(D/s)max = 0.000(Dr)max = 0.527 eÅ−3 (Dr)min = −0.349 eÅ−3
Measurement: X8 Apex, Bruker CCDProgram system: Apex 2
Structure determination: WinGX (SHELXL and SHELXS