Synthesis, structures and reaction mechanism of transition metal cluster complexes η~5-RC_5H_4(CO)_2

• 作 者: 宋礼成 申金玉 胡青眉 黄小荥
• 机 构: Department of Chemistry, Nankai University, Tianjin 300071, China,Department of Chemistry, Nankai Un
• 出 处: Science in China,Ser.B
• 发表日期: 1995年02期
• 关键词: complexes CO Co_3 RC_5H_4 Synthesis tetrahedral deviation bonded carbonyl bridge

The tetrahedral metal-cluster complexes containing alkylcyclopentadienyl ligand η5-RC5H4(CO)2 MCo3(CO)6(μ-CO)3(M = Mo, W; R=CH3, C2H5, n-C4H9, C6H5CH2) have been synthesized by thermal reaction of metal-metal single-bonded compounds [η5-RC5H4(CO)3M]2 with Co2(CO)8, and characterized by elemental analysis, 1R, 1H NMR and MS spectroscopies. The thermal reaction mechanism is studied and a single-crystal molecular structure of η5-n-C4H9C5H4(CO)2MoCo3(CO)6(μ-CO)3 determined with the X-ray diffraction method. The molecule crystallizes in the space group P21/C with cell parameters a= 1.0088(2), b= 1.3063(3), c=1 8320(5) ran, β = 96.04(2)°; the final deviation factor R = 0.041.

The tetrahedral metal-cluster complexes containing alkylcyclopentadienyl ligand η5-RC5H4 (CO) 2 MCo3 (CO) 6 (μ-CO) 3 (M═Mo, W; R═CH3, C2H5, n-C4H9, C6H5CH2) have been synthesized by thermal reaction of metal-metal single-bonded compounds [η5-RC5H4 (CO) 3M] 2 with Co2 (CO) 8, and characterized by elemental analysis, 1R, 1H NMR and MS spectroscopies. The thermal reaction mechanism is studied and a single The molecular crystallizes in the space group P21 / C with cell parameters a = 1.0088 () -crystal molecular structure of η5-n-C4H9C5H4 (CO) 2MoCo3 (CO) 6 B = 1.3063 (3), c = 1 8320 (5) ran, β = 96.04 (2) °, and the final deviation factor R = 0.041.