UZH-Logo

On the interrelationship of µ-OH bridged dimers, trimers, and tetramers of (en)PtII and their Ag+ adducts


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.

Abstract

[(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+.

[(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+.

Citations

9 citations in Web of Science®
10 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

2 downloads since deposited on 15 Feb 2009
0 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Language:English
Date:June 2008
Deposited On:15 Feb 2009 16:38
Last Modified:05 Apr 2016 13:01
Publisher:Royal Society of Chemistry
ISSN:1477-9226
Additional Information:Persons who receive the PDF must not make it further available or distribute it.
Publisher DOI:10.1039/b802924e
Permanent URL: http://doi.org/10.5167/uzh-13813

Download

[img]Filetype: PDF - Registered users only
Size: 1MB
View at publisher

TrendTerms

TrendTerms displays relevant terms of the abstract of this publication and related documents on a map. The terms and their relations were extracted from ZORA using word statistics. Their timelines are taken from ZORA as well. The bubble size of a term is proportional to the number of documents where the term occurs. Red, orange, yellow and green colors are used for terms that occur in the current document; red indicates high interlinkedness of a term with other terms, orange, yellow and green decreasing interlinkedness. Blue is used for terms that have a relation with the terms in this document, but occur in other documents.
You can navigate and zoom the map. Mouse-hovering a term displays its timeline, clicking it yields the associated documents.

Author Collaborations