Coordination chemistry of SCS PdII pincer systems

Henk Jan Van Manen, Kazuaki Nakashima, Seiji Shinkai, Huub Kooijman, Anthony L. Spek, Frank C.J.M. Van Veggel, David N. Reinhoudt

研究成果: Contribution to journalArticle査読

54 被引用数 (Scopus)


We have studied the coordination of substituted pyridines, and phosphorus- and sulfur-containing ligands to an SCS PdII pincer system. These ligands coordinate to PdII (trans to the cyclopalladated aryl group) by quantitative substitution of the labile acetonitrile ligand in complex 1. Competition experiments showed that both electronic and steric effects influence the strength of coordination to the PdII pincer of the substituted pyridines. A quantitative analysis of the substituent effect was achieved by a Hammett correlation. Phosphorus-containing ligands also coordinate to this SCS PdII motif, as evidenced by NMR spectroscopy and single-crystal X-ray diffraction studies. They are much stronger ligands than the pyridines. The coordination strength of the thioureas falls in between those of the pyridines and phosphanes/phosphites. Our results lead therefore to the following order of ligand strength towards Pd" in SCS PdII pincers: PR3 > P(OR)3 > N,N′-disubstituted thiourea > (substituted) pyridines > MeCN.

ジャーナルEuropean Journal of Inorganic Chemistry
出版ステータス出版済み - 12 1 2000

All Science Journal Classification (ASJC) codes

  • 無機化学


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