Reactions of manganese atoms with cyclic dienes and cycloheptatriene: crystal structure of carbonylbis(1–4-η-cyclohexa-1,3-diene)manganese
作者:E. Peter Kündig、Peter L. Timms、Barbara A. Kelly、Peter Woodward
DOI:10.1039/dt9830000901
日期:——
that the manganese atom adopts a square-pyramidal configuration with the carbonyl ligand in the axial position. The two hexadiene rings are each folded equatorially away from the Mn atom and the molecule has C2v symmetry. As in other diene complexes, the two inner C atoms are slightly closer to the metal [Mn–C (mean) 2.078(8)Å] than are the outer C atoms [Mn–C (mean) 2.159(7)Å]. The crystals are orthorhombic
锰原子与环戊二烯,环己-1,3-二烯,环庚三烯和环辛-1,3-二烯在–196°C的条件下缩合,然后在存在CO的情况下升温至20°C,得到了有机锰羰基以锰为基准,络合物的收率为5-10%。新化合物[锰(η 4 -C 6 H ^ 8)2(CO)],[锰(η 4 -C 7 ħ 8)2(CO)]和[锰(η 3 -C 8 ħ 13)( CO)4 ]已被分离。单晶X的射线衍射研究[锰(η 4 -C 6 H ^ 8)2(CO)]表明锰原子采用正方形-金字塔形构型,且羰基配体在轴向位置。两个己二烯环分别与Mn原子赤道折叠,并且分子具有C 2 v对称性。与其他二烯配合物一样,两个内部C原子比外部C原子[Mn–C(平均)2.159(7)Å]稍微靠近金属[Mn–C(平均值)2.078(8)Å]。晶体是正交晶体,在a = 8.570(1),b = 17.220(1)和c = 7.562(1)Å的晶胞中,Z = 4的空间群P