Issue 4, 2003

Pd(ii) Complexes with thiacalix[4]-arene and -aniline; subtle, but distinct influences of phenol and aniline units on the 3-D structure

Abstract

The Pd(II) complexes of thiacalix[4]aniline (TCAn) and thiacalix[4]arene (TCAr), in which four aniline and phenol units are linked by four sulfides at the o,o′-positions, respectively, were prepared by simply heating the ligands with Pd(II)(OAc)2 in CHCl3 or benzene at reflux and structurally characterized by X-ray diffraction methods. In TCAn, two thiacalix ligands adopting a pinched-cone conformation are fused at the narrower rims to coordinate to two Pd(II) ions by amide NH and the adjacent S atoms. In contrast for TCAr, two ligands coordinate to two Pd(II) ions with phenolate O and thioether S atoms at the narrower rims. Four sets of hydrogen bonding between the O and free OH cause a deviation of the Pd(II) centers from the square coordination plane and also lead the conformation of the calix to be more cone-like to provide enough space to accommodate guest CH3CN molecules.

Graphical abstract: Pd(ii) Complexes with thiacalix[4]-arene and -aniline; subtle, but distinct influences of phenol and aniline units on the 3-D structure

Supplementary files

Article information

Article type
Paper
Submitted
27 aug 2002
Accepted
02 des 2002
First published
14 jan 2003

Dalton Trans., 2003, 723-726

Pd(II) Complexes with thiacalix[4]-arene and -aniline; subtle, but distinct influences of phenol and aniline units on the 3-D structure

H. Katagiri, N. Morohashi, N. Iki, C. Kabuto and S. Miyano, Dalton Trans., 2003, 723 DOI: 10.1039/B208317E

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