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Synthesis, Structure and Noncovalent Interactions of Palladium(II) Complexes with N ‐Benzoyl‐ β ‐phenylalaninate Dianion and Aromatic Diimine
Author(s) -
Chen YaoFeng,
Gong YuQiu,
Zhang HuaSong
Publication year - 2002
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20020200610
Subject(s) - chemistry , ring (chemistry) , palladium , diimine , stacking , aromaticity , medicinal chemistry , phenylalanine , stereochemistry , side chain , deprotonation , crystallography , molecule , ion , amino acid , organic chemistry , catalysis , biochemistry , polymer
Two palladium(II) complexes, [Pd(bipy)(BzPhe‐N,O)] and [Pd(phen)(BzPhe‐N,O)]·4H 2 O were synthesized by reactions between Pd(bipy)Cl 2 and BzPheH 2 ( N ‐benzoyl‐ β ‐phenylalanine), Pd(phen) Cl 2 and BzPheH 2 in water at pH‐9, with their structures determined by X‐ray diffraction analysis. The Pd atom is coordinated by two nitrogen atoms of bipy (or phen), the deprotonated amido type nitrogen atom and one of the carboxylic oxygens of BzPhe (BzPhe = N ‐benzoyl‐β‐phenylalaninate dianion). In the complex [Pd(phen) (BzFne‐N,O)] · 4H 2 O, the side chain of phenylalanine is located above and approximately parallels to the coordination plane. Both the aromatic‐aromatic stacking interaction between the phenyl ring of phenylalanine and phen, and the metal ion‐aromatic interaction between the phenyl ring of phenylalanine and Pd(II) were observed. [Pd(bipy)(BzPhe‐N,O)] has the phenylalanyl side chain oriented outwards from the coordination plane, which is mainly due to the interaction between the carbonyl oxygen atom of the amido group and the phenyl ring of phenylalanine. The reason for the different orientation of phenylalanyl side chain in the complexes was suggested.