N,N-bis(1H-benzimidazol-2-ylmethyl)-N-methylamine → N,N-bis(1H-benzimidazol-2-ylmethyl)-N-methylamine chromium (III) chloride

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3b was synthesised by an analogous procedure to that described for 3a using 2b (2 g, 6.87 mmol) and CrCl3(THF)3 (2.57 g, 6.87 mmol). Yield 2.87 g (93%). Anal. Calc. for C17H17Cl3CrN5 (in %): C, 45.40; H, 3.81; N, 15.57. Found C, 45.35; H, 3.76; N, 15.66. IR (KBr, cm−1), υ 3221 (NH, s), υ 1622-1544 (ArC═C, C═N, m), δ 1455, 1477, 1497 (N—H, s), υ 1274 (CN, s), δ 753 (CH, s). UV-VIS (DMF, 298 K): λmax/nm (εmax/dm3 mol−1 cm−1)=464 (156), 659 (75), 723 (shoulder). +FAB-MS: (m/z): 413 ([M-Cl]+), 291 ([M-CrCl3]). μeff·=3.60 MB.

Provenance & Evidence