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- W2095433134 abstract "Comparative X-ray crystallographic characterization of [Re(dpp)(CO)3Cl] and [Re(CO)3Cl]2dpp, where dpp is 2,3-bis(2-pyridyl)pyrazine, has been conducted to examine the structural consequences resulting from sequential coordination of two [Re(CO)3Cl] molecular fragments to dpp. Addition of one metal center results in the coordinating portion of dpp adopting a relatively planar configuration. The dihedral angle between the pyrazine ring and the coordinated N(1)-pyridyl ring is 15.3(4)°, while the dihedral angle between the pyrazine ring and the uncoordinated N(2)-pyridyl ring is 45.8(3)°. The dpp ligand in the bimetallic complex is found to twist to accommodate the second metal center as manifested by a two-fold increase in the N(1)-pyridyl and pyrazine dihedral angle [29.7(4)°] and a decrease for the N(2)-pyridyl and pyrazine dihedral angle [31.6(3)°]. The direct structural consequence is an increase in the distortion of the central pyrazine moiety upon addition of each [Re(CO)3Cl] fragment. This observation confirms previously reported spectroscopic results that inferred the differences in electronic structure between [Re(dpp)(CO)3Cl] and [Re(CO)3Cl]2dpp were due to the dpp ligand adopting a nonplanar geometry in the bimetallic complex." @default.
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- W2095433134 date "1998-11-01" @default.
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- W2095433134 title "Comparative X-ray crystallographic characterization of the mono- and bimetallic complexes of rhenium(I) tricarbonyl chloride with 2,3-bis(2-pyridyl)pyrazine" @default.
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- W2095433134 doi "https://doi.org/10.1016/s0277-5387(98)00205-8" @default.
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