Volume 37, Issue 15 pp. 2128-2131
Communication

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

Mirka Bergamo

Mirka Bergamo

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

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Tiziana Beringhelli

Tiziana Beringhelli

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

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Giuseppe D'Alfonso

Giuseppe D'Alfonso

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

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Pierluigi Mercandelli

Pierluigi Mercandelli

Dipartimento di Chimica Strutturale e Stereochimica Inorganica e Centro CNR CSSMTBO„ Via Venezian 21, I-20133 Milano (Italy)

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Massimo Moret

Massimo Moret

Dipartimento di Chimica Strutturale e Stereochimica Inorganica e Centro CNR CSSMTBO„ Via Venezian 21, I-20133 Milano (Italy)

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Angelo Sironi

Angelo Sironi

Dipartimento di Chimica Strutturale e Stereochimica Inorganica e Centro CNR CSSMTBO„ Via Venezian 21, I-20133 Milano (Italy)

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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.

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