New X-ray powder diffraction data for the series CpMn(CO)_3, Cp(CO)_2Mn=C=CHPh, [Cp(CO)_2Mn]_2(μ-C=CHPh), and [Cp(CO)_2Mn]_2(μ-C_4Ph_2) complexes (Cp= η~5-C_5H_5)

摘要

Four manganese carbonyl complexes: CpMn(CO)_3 (1) and its phenylvinylidene derivatives Cp(CO)_2Mn=C=CHPh (2), Cp(CO)_2Mn]_2(μ-C=CHPh) (3), and Cp(CO)_2Mn=C=C(Ph)-C(Ph)=C=Mn(CO)_2Cp (4) have been studied by X-ray powder diffraction and their unit cell parameters are reported. The monoclinic cell parameters found for complex (1) are a= 12.0479(7) A, b = 7.0614(5) A, c= 10.9172(6) A, β= 117.626(2)°, Z=4, space group P2(1)/a (No. 14). The orthorhombic cells parameters for complex (2) are a = 10.5240(12) A, b = 33.1105(48) A, c = 7.5007(9) A, Z=8, space group PCCN (No. 56); for complex (3) are a= 15.3545(17) A, b=15.3966(18) A, c = 8.0033(7) A, Z=4, space group P2_12_12_12_1 (No. 19). The parameters found for complexes (1-3) are in good agreement with those obtained from single crystal X-ray diffractometry. The single crystal structure of complex (4) has not been studied. The orthorhombic cell parameters for complex (4) found by X-ray powder diffraction method are a= 10.0986(9) A, b = 33.2937(27) A, c = 7.4139(5) A, Z=4, space group P2_1 (No. 4).