Silver(I) Nitrate Adducts with Bidentate 2-, 3- and 4-pyridyl Phosphines. Solution 31P and [31P-109Ag] NMR Studies of 1:2 complexes and crystal structure of dimeric [{Ag(d2pype)(u-d2pype)}2]-[NO3]2.2CH2Cl2 [d2pype = 1,2-bis(di-2-pyridylphosphino)ethane]

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Title Silver(I) Nitrate Adducts with Bidentate 2-, 3- and 4-pyridyl Phosphines. Solution 31P and [31P-109Ag] NMR Studies of 1:2 complexes and crystal structure of dimeric [{Ag(d2pype)(u-d2pype)}2]-[NO3]2.2CH2Cl2 [d2pype = 1,2-bis(di-2-pyridylphosphino)ethane]
Author Berners-Price, Sue; Bowen, Richard; Harvey, Peta; Healy, Peter Conrad; Koutsantonis, G.A.
Journal Name Journal of the Chemical Society. Dalton Transactions
Year Published 1998
Place of publication UK
Publisher Royal Society of Chemistry
Abstract The 12 complexes of silver(I) nitrate with 1,2-bis(di-n-pyridylphosphino)ethane (dnpype) for n = 2, 3 and 4 have been synthesized and solution properties characterized by NMR spectroscopy, including variable-temperature one-dimensional 31P-{1H}, two-dimensional [31P–31P] COSY and [31P–109Ag] HMQC NMR experiments. The 3-pyridyl (d3pype) and 4-pyridyl (d4pype) complexes exist as bis-chelated monomeric [Ag(d3pype)2]+ and [Ag(d4pype)2]+ while the 2-pyridyl (d2pype) complex forms an equilibrium mixture of monomeric [Ag(d2pype)2]+, dimeric [{Ag(d2pype)2}2]2+ and trimeric [{Ag(d2pype)2}3]3+ species in which the d2pype ligands co-ordinate in both bridging and chelated modes via the phosphorus atoms. The relative percentages of the species present are dependent on both temperature and solvent. Crystals of the 2-pyridyl complex obtained from CH2Cl2–Et2O solution have been shown by crystal structure determination to be the dimer [{Ag(d2pype)(µ-d2pype)}2][NO3]2·2CH2Cl2. Each silver ion is co-ordinated by one chelated and two bridging d2pype ligands forming a ten-membered ring in a double boat conformation. The pyridyl nitrogen atoms do not co-ordinate to the silver. The differences in solution behaviour of the three systems and the potential significance of these complexes to the antitumour properties of chelated 12 silver(I) diphosphine complexes are discussed.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.rsc.org/Publishing/Journals/dt/index.asp
Alternative URI http://dx.doi.org/10.1039/a709098f
Copyright Statement Copyright 1998 Royal Society of Chemistry. Please refer to the journal link for access to the definitive, published version.
Volume -
Page from 1743
Page to 1750
ISSN 1472-7773
Date Accessioned 1999-01-01
Language en_AU
Research Centre Institute for Glycomics
Faculty Faculty of Science
Subject PRE2009-Chemical Sciences
URI http://hdl.handle.net/10072/15593
Publication Type Article in Scholarly Refereed Journal
Publication Type Code c1

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