The reaction of the cyclic tetrayne 2 with Co-2(CO)(8) at 25 degrees C has yielded the double addition product, C20H8[Co-2(CO)(6)](2), 3 in a 39% yield. Compound 3 was characterized by a single crystal X-ray diffraction analysis. The two Co-2(CO)(6) groupings have been added to two alkyne groups on opposite sides of the tetrayne ring in order to minimize steric interactions. The molecule is centrosymmetrical and the central C-12 ring is planar. The two Go-Co bonds are oriented perpendicular to the plane of the C-12 ring. (C) 1999 Elsevier Science S.A. All rights reserved.
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Univ Bologna, Dipartimento Chim Ind Toso Montanari, I-40136 Bologna, ItalyUniv Bologna, Dipartimento Chim Ind Toso Montanari, I-40136 Bologna, Italy
Ciabatti, Iacopo
de Biani, Fabrizia Fabrizi
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Univ Siena, Dipartimento Chim, I-53100 Siena, ItalyUniv Bologna, Dipartimento Chim Ind Toso Montanari, I-40136 Bologna, Italy
de Biani, Fabrizia Fabrizi
Femoni, Cristina
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Univ Bologna, Dipartimento Chim Ind Toso Montanari, I-40136 Bologna, ItalyUniv Bologna, Dipartimento Chim Ind Toso Montanari, I-40136 Bologna, Italy
Femoni, Cristina
Iapalucci, Maria Carmela
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Univ Bologna, Dipartimento Chim Ind Toso Montanari, I-40136 Bologna, ItalyUniv Bologna, Dipartimento Chim Ind Toso Montanari, I-40136 Bologna, Italy
Iapalucci, Maria Carmela
Longoni, Giuliano
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Univ Bologna, Dipartimento Chim Ind Toso Montanari, I-40136 Bologna, ItalyUniv Bologna, Dipartimento Chim Ind Toso Montanari, I-40136 Bologna, Italy
Longoni, Giuliano
Zacchini, Stefano
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Univ Bologna, Dipartimento Chim Ind Toso Montanari, I-40136 Bologna, ItalyUniv Bologna, Dipartimento Chim Ind Toso Montanari, I-40136 Bologna, Italy