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[17] Preparation of complex [MoO2(L)]n: To a methanol solution containing 6 mmol of the ligand
(1.83 g) was added a methanolic solution of [MoO2(acac)2] (1.95 g, 6 mmol). The mixture was
refluxed for 24 h under magnetic stirring condition. A brown precipitate was obtained. The
precipitate was filtered and washed with hot methanol and dried at the atmosphere.
Yield: 1.9 g, 73%. IR (KBr) (max/cm-1): 1610 ν(N=C), 925 ν(Mo=O), 807 ν(Mo─O─Mo). Anal.:
1
Calcd. For C14H10BrNO4Mo: C, 38.92; H, 2.33; N, 3.24. Found: C, 38.60; H, 3.15; N, 3.18. H
NMR (500 MHz, 25 °C, DMSO-d6): δ=9.21 (s, 1H; CH=N), 6.70-8.00 (m, 6H, aromatic rings),
2.31 ppm (s, 3H, (CH3)). 13C NMR: δ=161.1 (C=N), 159.1 and 156.1 (C2, C8), 112.1-138.3 (other
aromatic carbons), 21.3 (CH3).