Synthesis and Structure Characterization of Molybdenum Complexes with an Electronic Model Compound of Fullerene──Methyl Acrylate (η2-CH2 =CHCOOMe)2,Mo (CO)2, (bipy)

Abstract

Abstract: The title complexes were synthesized by the reaction of Mo (CO)₄ (bipy) withmethyl acrylate, an electron-deficient alkene model compound of fullerene- Two crystals 1and 2 of a pair of geometrical isomers were obtained under different crystalization conditionsand characterized by XRDand IR.Crystal 1 belongs to the monoclinic system with spacegroup P2₁/n, a=0' 7800(2) nm, b= 1.9015(4) nm, c= 1.3996(2) nm, β= 1O3. 20(3)°,V=2.0210(8) nm³, D_c= 1.579 g/cm³, Z= 4.The final Ris 0.0235 for 3021 reflections[F>4.0 σ(F)].Crystal 2 belongs to the monoclinic system with space group P2₁/n, α =0.9075(2) nm, b=1.9491(4) nm, c=1.1291 (2) nm, β=100.52(3)°, V=1.9636(7)nm°, D_c= 1.686 g/cm³ , Z=4.The final Ris 0.0818 for 1473 reflections [F>4.0σ(F)].In the molecules of both crystals, molybdenum atom coordination is distorted octahedral.with the two COgroups cis to each orther, but each trans to a pyridyl group of 2,2' -bipyri-dine.The Mo atom is bound in an η²-fashion to C-Cdouble bonds of two methyl acrylatesin axial direction of the octahedron.The main difference in the two geometrical isomers isthat the methyl ester groups of the two methyl acrylate are rotated 180°

Key words: Fullerene, Methyl acrylate, Molybdenum complex, Crystal structure, Geomet-rical isomers

CLC Number:

O614.61

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JIN Xiang-Lin, TANG Ka-Luo, ZENG Hui, ZHENG Shi-Jun, TANG You-Qi. Synthesis and Structure Characterization of Molybdenum Complexes with an Electronic Model Compound of Fullerene──Methyl Acrylate (η²-CH₂ =CHCOOMe)₂,Mo (CO)₂, (bipy)[J]. Chem. J. Chinese Universities, 1997, 18(7): 995.

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Synthesis and Structure Characterization of Molybdenum Complexes with an Electronic Model Compound of Fullerene──Methyl Acrylate (η²-CH₂ =CHCOOMe)₂,Mo (CO)₂, (bipy)

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