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1H, 13C, 15N and 195Pt NMR studies of Au(III) and Pt(II) chloride organometallics with 2-phenylpyridine

✍ Scribed by Leszek Pazderski; Tomasz Pawlak; Jerzy Sitkowski; Lech Kozerski; Edward Szłyk

Publisher: John Wiley and Sons
Year: 2009
Tongue: English
Weight: 241 KB
Volume: 47
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.2491

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✦ Synopsis

Abstract

^1^H, ^13^C, ^15^N and ^195^Pt NMR studies of gold(III) and platinum(II) chloride organometallics with N(1),C(2′)‐chelated, deprotonated 2‐phenylpyridine (2ppy*) of the formulae [Au(2ppy*)Cl~2~], trans(N,N)‐[Pt(2ppy*)(2ppy)Cl] and trans(S,N)‐[Pt(2ppy*)(DMSO‐d~6~)Cl] (formed in situ upon dissolving [Pt(2ppy*)(µ‐Cl)]~2~ in DMSO‐d~6~) were performed. All signals were unambiguously assigned by HMBC/HSQC methods and the respective ^1^H, ^13^C and ^15^N coordination shifts (i.e. differences between chemical shifts of the same atom in the complex and ligand molecules: Δ^1H^~coord~ = δ^1H^~complex~ − δ^1H^~ligand~, Δ^13C^~coord~ = δ^13C^~complex~ − δ^13C^~ligand~, Δ^15N^~coord~ = δ^15N^~complex~ − δ^15N^~ligand~), as well as ^195^Pt chemical shifts and ^1^H‐^195^Pt coupling constants discussed in relation to the known molecular structures. Characteristic deshielding of nitrogen‐adjacent H(6) protons and metallated C(2′) atoms as well as significant shielding of coordinated N(1) nitrogens is discussed in respect to a large set of literature NMR data available for related cyclometallated compounds. Copyright © 2009 John Wiley & Sons, Ltd.

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