- 期刊
The Molecular Structure of (Bicyclo[2.2.1]Heptadiene)Tetracarbonylmolybdenum
（雙環庚二烯）四羰基鉬之分子構造
摘要
（雙環庚二烯）四羰基鉬以X光繞射分析出其構造如下：中央鉬金屬之配位為正八面體，兩個烯基配位在順式位置。相對於烯基之兩個羰基夾角為93.0(1)°，另外兩個羰基則成168.4(1)°。有如下的相關性存在：∠C(1)-Mo-C(2)增大時則∠C(3)-Mo-C(4)減小。本分子在固態下，原有之分子對稱性C_(2v)受到干擾。羰基對羰基時與羰基對烯基時之構造參數差異性可從廻鍵性質與羰基和烯基間π酸強度差別來解釋。
關鍵字
無資料並列摘要
(Bicyclo[2.2 .1] heptadiene)tetracarbonylmolybdenum was studied with X-ray diffraction. The coordination sphere around Mo metal center is approximately octahedral with the two C=C groups at the cis positions. The two CO ligands trans to C=C make an angle of 93.0(1)°, whereas the other two CO ligands make an angle of 168.4(1)°. A correlation could be envisioned that ∠C(1)-Mo-C(2) increases from 90° at the same time ∠C(3)-Mo-C(4) decreases from 180°. The molecular C_(2v) is seemingly broken in the crystalline state. The difference in structure parameters between the CO ligand trans to CO ligand and the CO ligand trans to C=C group is in excellent agreement with the theory of back bonding taking into account the difference in π acidity between a CO ligand and a C=C group.
並列關鍵字
無資料延伸閱讀
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