[Re5 (μ-H)4 (CO)20 ]- and [Re5 (μ-H)5 (CO)20 ], Two Isolobal Analogues of Cyclopentane

Mirka Bergamo; Tiziana Beringhelli; Giuseppe D'Alfonso; Pierluigi Mercandelli; Massimo Moret; Angelo Sironi

doi:10.1002/(SICI)1521-3773(19980817)37:15<2128::AID-ANIE2128>3.0.CO;2-7

[Re₅ (μ-H)₄ (CO)₂₀ ]^- and [Re₅ (μ-H)₅ (CO)₂₀ ], Two Isolobal Analogues of Cyclopentane

Angew Chem Int Ed Engl. 1998 Aug 17;37(15):2128-2131. doi: 10.1002/(SICI)1521-3773(19980817)37:15<2128::AID-ANIE2128>3.0.CO;2-7.

Authors

Mirka Bergamo¹, Tiziana Beringhelli¹, Giuseppe D'Alfonso¹, Pierluigi Mercandelli², Massimo Moret², Angelo Sironi²

Affiliations

¹ Dipartimento di Chimica Inorganica, Metallorganica e Analitica e Centro CNR CSSMTBO, Via Venezian 21, I-20133 Milano (Italy), Fax: (+39) 2-2362748.
² Dipartimento di Chimica Strutturale e Stereochimica Inorganica e Centro CNR CSSMTBO" Via Venezian 21, I-20133 Milano (Italy).

Abstract

The first five-membered rings of metal atoms connected by M-M or M-H-M bonds only have been obtained by a Re₂ +Re₃ condensation in which a polyhydride acts as a bridging bidentate ligand toward a coordinatively unsaturated fragment (see scheme below). In spite of the octahedral coordination of the Re centers, the Re₅ rings display conformations (twisted and envelope) comparable with those observed for organic five-membered rings of tetrahedral carbon atoms.

Keywords: Carbonyl complexes; Clusters; Hydrides; Isolobal relationship; Rhenium.