Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Coordination-Site Exchange of Azaheterocyclic Ligands in Five-Coordinate Palladium(II) Complexes. Bis(4,7-dimethyl-1,10-phenanthroline)(triphenylphosphine)palladium(II) Tetrafluoroborate and the 4,7-Diphenyl Derivative
Shinsaku Yamazaki
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1987 Volume 60 Issue 3 Pages 1155-1156

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Abstract

Variable-Temperature 1H NMR suggests that the fluxional motion of a potentially five-coordinate complex [Pd(PPh3)(4,7-R2-phen)2][BF4]2 (R=Me, Ph) is frozen at lower temperatures, where the complex is in a rigid configuration (an unusual trigonal bipyramid). The fluxional motion is explained by two synchronous rearrangement systems, and an activation parameter, ΔG*, for the site exchange is given.

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