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The trans ‐Influence in Platinum (II) Complexes. 1 H‐ and 13 C‐NMR. and X‐ray structural studies of tridentate Schiff 's base complexes of platinum (II)
Author(s) -
Motschi Herbert,
Nussbaumer Cornelius,
Pregosin Paul S.,
Bachechi Fiorella,
Mura Pasquale,
Zambonelli Luigi
Publication year - 1980
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19800630734
Subject(s) - chemistry , imine , ligand (biochemistry) , platinum , amine gas treating , pyridine , schiff base , stereochemistry , crystallography , metal , medicinal chemistry , organic chemistry , catalysis , biochemistry , receptor
1 H‐ and 13 C‐NMR. data are reported for the complexes [Pt (1) L] and [Pt (2) L]; 1 = OC 6 H 4 CH NCH 2 CH 2 O, 2 = OC 6 H 4 CH NC 6 H 4 O; L = PR 3 , AsR 3 , C N (cyclohexyl), DMSO, pyridine, secondary amine. The molecular structures of [Pt (2) (NHEt 2 )] (I) and [Pt (2) (PPh 3 )] (II) have been determined by X‐ray analysis. Relevant bond distances for I: Pt‐N (amine) = 2.076 Å, Pt‐N (imine) = 2.017 Å, Pt‐O = 1.992 Å and 2.002 Å; for II: Pt‐P = 2.248 Å, Pt‐N = 2.064 Å, Pt‐O = 1.964 and 2.005 Å. Both the solid and solution state data are interpreted in terms of differences in the trans influence of the ligand L. The question of metal‐ligand d‐p π back bonding to the imine is discussed.