UZH-Logo

Diplatinum(III) Complexes with Four Bridging 1-Methylcytosinato Nucleobases Derived from a Mononucleartrans-(NH3)2PtIIComplex and CuII


Müller, Jens; Freisinger, Eva; Sanz Miguel, Pablo J; Lippert, Bernhard (2003). Diplatinum(III) Complexes with Four Bridging 1-Methylcytosinato Nucleobases Derived from a Mononucleartrans-(NH3)2PtIIComplex and CuII. Inorganic Chemistry, 42(17):5117-5125.

Abstract

A heteronuclear complex of composition trans-[(NH3)2Pt(N4-1-MeC--N3)2Cu(H2O)2](ClO4)2 (1a), with 1-MeC- = 1-methylcytosinate, has been prepared and characterized by X-ray crystallography. 1a (Cu,Pt) is a linkage isomer of a previously described compound with the two metals inverted (Pt,Cu). The intermetallic distances are significantly different in the two types of compounds, 2.6109(9) Å in 1a, yet 2.49−2.56 Å in several forms of the linkage isomer. When heated in water in the presence of air, 1a is converted in low yield into diplatinum(III) compounds [(H3N)Pt(1-MeC--N3,N4)4Pt(NH3)]2+ (2a) and [(H2O)Pt(1-MeC--N3,N4)4Pt(NH3)]2+ (2b), which were crystallized as ClO4- salts. In a modified procedure a third representative of this group of diplatinum(III) compounds, [(O2N)Pt(1-MeC--N3,N4)4Pt]+ (2c) was isolated. All three compounds contain the four bridging 1-MeC ligands in a head,tail,head,tail arrangement with Pt−Pt distances (2.4516(7)−2.4976(9) Å) that are the shortest ones among diplatinum(III) compounds containing nucleobases.

A heteronuclear complex of composition trans-[(NH3)2Pt(N4-1-MeC--N3)2Cu(H2O)2](ClO4)2 (1a), with 1-MeC- = 1-methylcytosinate, has been prepared and characterized by X-ray crystallography. 1a (Cu,Pt) is a linkage isomer of a previously described compound with the two metals inverted (Pt,Cu). The intermetallic distances are significantly different in the two types of compounds, 2.6109(9) Å in 1a, yet 2.49−2.56 Å in several forms of the linkage isomer. When heated in water in the presence of air, 1a is converted in low yield into diplatinum(III) compounds [(H3N)Pt(1-MeC--N3,N4)4Pt(NH3)]2+ (2a) and [(H2O)Pt(1-MeC--N3,N4)4Pt(NH3)]2+ (2b), which were crystallized as ClO4- salts. In a modified procedure a third representative of this group of diplatinum(III) compounds, [(O2N)Pt(1-MeC--N3,N4)4Pt]+ (2c) was isolated. All three compounds contain the four bridging 1-MeC ligands in a head,tail,head,tail arrangement with Pt−Pt distances (2.4516(7)−2.4976(9) Å) that are the shortest ones among diplatinum(III) compounds containing nucleobases.

Citations

17 citations in Web of Science®
18 citations in Scopus®
Google Scholar™

Altmetrics

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:2003
Deposited On:27 Jun 2012 11:34
Last Modified:05 Apr 2016 15:40
Publisher:American Chemical Society
ISSN:0020-1669
Publisher DOI:10.1021/ic0343152

Download

Full text not available from this repository.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