Synthesis and Crystal Structure of (L)_2W(CO)_4·CH_3COCH_3 (L=1-Phenacylimidazole)

• 出 处: 结构化学
• 发表日期: 2006年06期
• 关键词: carbonyl heterocyclic imidazole pyrazole octahedral tungsten membered hexane num

The reaction of 1-phenacylimidazole with W(CO)6 in a 1:1 molar ratio under irra- diation with a high-pressure Hg lamp mainly yielded the title compound (C29H26N4O7W, Mr = 726.39), which is of orthorhombic, space group Pbca with a = 27.665(4), b = 7.7807(12), c = 27.803(4) ?, V = 5984.8(16) ?3, Z = 8, Dc = 1.612 g/cm3, λ(MoKα) = 0.71073 ?, μ = 3?.911 mm?1, F(000) = 2864, R = 0.0583 and wR = 0.1502 for 3356 observed reflections (I > 2σ(I)). The crystal structural analysis indicates that in the coordination geometry of tungsten, 1-phenacylimidazole acts as a monodentate ligand and two imidazole ligands locate in a cis-position.

The reaction of 1-phenacylimidazole with W (CO) 6 in a 1: 1 molar ratio under irra- diation with a high-pressure Hg lamp primarily yielded the title compound (C29H26N4O7W, Mr = 726.39), which is of orthorhombic, space group Pbca with a = 27.665 (4), b = 7.7807 (12), c = 27.803 (4) ?, V = 5984.8 (16)? 3, Z = 8, Dc = 1.612 g / cm3, μ = 3 · .911 mm · 1, F (000) = 2864, R = 0.0583 and wR = 0.1502 for 3356 observed reflections (I> 2σ (I)). The crystal structural analysis indicates that in the coordination geometry of tungsten, 1-phenacylimidazole acts as a monodentate ligand and two imidazole ligands locate in a cis-position.