Modes of Reactivity of Cyclic Diynes: Probing the  syn / anti  Selectivity of Tetrathiacycloalkadiynes and Mono(alkyne)cobalt Complexes | Zendy

Benisch Christoph | Zendy; Werz Daniel B. | Zendy; Gleiter Rolf | Zendy; Rominger Frank | Zendy; Oeser Thomas | Zendy

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Modes of Reactivity of Cyclic Diynes: Probing the syn / anti Selectivity of Tetrathiacycloalkadiynes and Mono(alkyne)cobalt Complexes

Author(s) -

Benisch Christoph,

Werz Daniel B.,

Gleiter Rolf,

Rominger Frank,

Oeser Thomas

Publication year - 2003

Publication title -

european journal of inorganic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.667

H-Index - 136

eISSN - 1099-0682

pISSN - 1434-1948

DOI - 10.1002/ejic.200390141

Subject(s) - cyclobutadiene , chemistry , metallacycle , reactivity (psychology) , alkyne , cyclopentadienyl complex , acetylene , cobalt , stereochemistry , selectivity , crystallography , medicinal chemistry , molecule , x ray crystallography , organic chemistry , catalysis , medicine , physics , alternative medicine , pathology , diffraction , optics

Cyclic tetrathiaalkadiynes in which two 1,4‐dithiaalkyne units are connected with alkane bridges of length n and m [ A( m.n ) ] were treated with [η 2 ‐bis( tert ‐butylsulfonyl)acetylene]carbonyl(η 5 ‐cyclopentadienyl)cobalt( I ) ( 8a ) and several substituted analogues ( 8b − 8e ) in order to probe the reactivity of electron‐rich cyclic diynes. Both mono‐ [ B( m.n ) ] and bis(cyclobutadiene) [ C( m.n ) ] complexes were isolated as products of these reactions and the anti / syn ratio of C( m.n ) was determined. For m , n < 4 the syn isomers dominate and this is attributed to the configuration of the intermediate metallacycle which is correlated with the conformations of the rings in the mono(cyclobutadiene) products B( m.n ) . This analysis was corroborated by X‐ray structural investigations of the products. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)

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