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Tetraphenyl rac ‐3,3,7,7‐Tetramethyl‐ trans ‐5 palladatricyclo[4.1.0.0 2,4 ]‐heptane‐1,2,4,6‐tetracarboxylate: A New PTH Derivative and the First X‐ray Crystallographic Study of a Bis(acetone)palladium(II) Complex
Author(s) -
Hashmi A. Stephen K.,
Naumann Frank,
Bats Jan W.
Publication year - 1997
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19971301016
Subject(s) - chemistry , steric effects , planarity testing , ligand (biochemistry) , acetone , heptane , denticity , derivative (finance) , stereochemistry , medicinal chemistry , crystallography , crystal structure , organic chemistry , biochemistry , receptor , financial economics , economics
The title compound rac ‐ 9 and its bis(acetone) complex rac ‐ 10 were prepared, and the latter investigated by X‐ray structure analysis. rac ‐ 10 proves that the coordination of the weak donor acetone, an easily substitutable ligand in PTHs and related compounds, is an essential point for dissolving these coordination polymers, and thus allowing catalysis reactions in such solvents. Furthermore rac ‐ 10 shows only a small deviation from the square‐planar coordination expected for Pd 11 . This indicates that the strong deviation from planarity observed in complexes with more sterically demanding, bidentate ligands is caused by steric interactions with the substituents on the PTH, rather than by electronic effects.