Formation of η<sup>3</sup>-bonded lactone complexes and eight-membered ring metallacycles with ketene groups by the insertion of acetylenes into carbon–molybdenum and –tungsten σ bonds; molecular and crystal structures of carbonyl(η-cyclopentadienyl)(3–5-η-2,3-dihydro-3,4,5-trimethyl-2-oxo-3-furyl)(t-butyl isocyanide)molybdenum and carbonyl-(η-cyclopentadienyl)(3–4:5–6-η-2,3,4,5-tetramethyl-6-oxo-1-trifluoromethylhexa-1,3,5-trienyloxo)molybdenum
作者:Michael Green、Jeffrey Z. Nyathi、Caron Scott、F. Gordon A. Stone、Alan J. Welch、Peter Woodward
DOI:10.1039/dt9780001067
日期:——
complexes of the type [Mη3-[graphic omitted]}(CO)(η-C5H5)L](L = CO, CNBut, CNC6H11, or PPh3). The complex where L = CNBut and R = Me is structurally identified by single-crystal X-ray diffraction. Crystals are monoclinic, space group P21/a with four molecules in a unit cell of dimensions a= 9.3013(15), b= 22.161(6), c= 9.353(3)Å, and β= 102.76(2)°. The mode of formation of this type of complex is discussed
的反应[MR(CO)3(η-C 5 H ^ 5)](M =钼,R = COCF 3,Me或物理信道2 ; M = W,R = COCF 3或Me)与丁-2-炔热或上UV照射,得到结晶性乙烯基酮络合物[[图形省略]} - (CO)2(η-C 5 H ^ 5)](R = CF 3,Me或物理信道2)。这些复合物具有给体反应的配体如CNBu吨,CNC 6 ħ 11,CO,或PPH 3以形成η 3个的类型[M的-烯丙基内酯络合物η 3 - [图形省略]}(CO)(η-C5 H 5)L](L = CO,CNBu t,CNC 6 H 11或PPh 3)。通过单晶X射线衍射在结构上鉴定出L = CNBu t和R = Me的络合物。晶体是单斜晶,空间群P 2 1 / a,在一个单元格中具有四个分子,尺寸为a = 9.3013(15), b = 22.161(6), c = 9.353(3)Å和β= 102