Issue 43, 2008
From the journal:

Dalton Transactions

Complexes of the [Re6(μ3-Se)8]2+ core-containing clusters with the water-soluble 1,3,5-triaza-7-phosphaadamantane (PTA) ligand: unexpected ligand protonation and related studies†

Xiaoyan Tu,a   Gary S. Nichol,a   Ruiyao Wangb  and  Zhiping Zheng*a  

* Corresponding authors

a Department of Chemistry, The University of Arizona, Tucson, Arizona
E-mail: zhiping@u.arizona.edu

b Department of Chemistry, Queen's University, 90 Queen's Crescent, Kingston, Ontario, Canada

Abstract

Three new complexes of the [Re6(μ3-Se)8]2+ core-containing clusters with the water-soluble trialkylphosphine ligand 1,3,5-triaza-7-phosphaadamantane (PTA), [Re6(μ3-Se)8(PEt3)5(PTA)](SbF6)2 (P5PTA, 1), [Re6(μ3-Se)8(PEt3)5(PTAH)][Re6(μ3-Se)8(PEt3)5(PTA)](SbF6)5 (2), and [Re6(μ3-Se)8(PEt3)5(PTAH)]2(HBr)(SbF6)2Br4 (3) have been prepared and structurally characterized. Unexpected protonation of the cluster-bound PTA ligand was observed when coordination of 1 with HgI2 was attempted, affording compound 2 featuring a protonated PTA ligand, PTAH. Deliberate acidification of 1 with HBr produced compound 3, and the protonation was investigated by using 31P NMR spectroscopy. Crystallographic studies revealed distinct structural distortions of the ligand as a result of protonation.

Graphical abstract: Complexes of the [Re6(μ3-Se)8]2+ core-containing clusters with the water-soluble 1,3,5-triaza-7-phosphaadamantane (PTA) ligand: unexpected ligand protonation and related studies

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Article information

DOI
https://doi.org/10.1039/B806888G
Article type
Paper
Submitted
23 Apr 2008
Accepted
29 Jul 2008
First published
22 Sep 2008

Dalton Trans., 2008, 6030-6038

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Complexes of the [Re6(μ3-Se)8]2+ core-containing clusters with the water-soluble 1,3,5-triaza-7-phosphaadamantane (PTA) ligand: unexpected ligand protonation and related studies

X. Tu, G. S. Nichol, R. Wang and Z. Zheng, Dalton Trans., 2008, 6030 DOI: 10.1039/B806888G

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