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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-13813

Shen, W Z; Schnebeck, R D; Freisinger, E; Lippert, B (2008). On the interrelationship of µ-OH bridged dimers, trimers, and tetramers of (en)PtII and their Ag+ adducts. Dalton Transactions, (30):4044-4049.

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[(en)Pt(-OH)2Pt(en)]2+, a dinuclear -hydroxo bridged complex (with en = ethylenediamine) crystallizes with excess AgNO3 in high yield as the trinuclear complex [{(en)Pt(-OH)2Pt(en)}Ag](NO3)3 (Pt2Ag, 1) from water. The two halves of the complex are significantly bent (dihedral angle 42.2°) and the three metals form a triangle with the following distances: Pt1Pt2, 2.9729(9) , Pt1Ag1, 2.818(1) and Pt2Ag1, 2.809(1) . The shortness of the PtAg distances and the dispositions of the three metal ions strongly suggest that dative bonds from Pt to Ag are responsible for the bending of the two halves of the edge-sharing dinuclear [(en)Pt(-OH)2Pt(en)]2+ complex. This scenario appears to be yet another cause of bending of edge-sharing dinuclear -OH bridged metal complexes of d8 metal ions, adding to those involving PtPt bonding, or anion binding, among others. Comparison with related -OH dimers of cis-(NH3)2PtII or (tmeda)PtII (tmeda = N,N,N,N-tetramethylethylenediamine), which do not display Ag+ binding, suggests that the feature of Ag+ binding is not common to all cis-bis(am(m)ine) complexes of PtII. Interestingly the complete removal of Ag+ from 1 does not lead to the -OH dimer but rather to the known -OH tetramer [{(en)Pt(-OH)}4]4+.


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Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Date:June 2008
Deposited On:15 Feb 2009 16:38
Last Modified:05 Apr 2016 13:01
Publisher:Royal Society of Chemistry
Additional Information:Persons who receive the PDF must not make it further available or distribute it.
Publisher DOI:10.1039/b802924e

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