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Tetrahedral Carbonylcobalt Clusters
Author(s) -
Schmid Günter
Publication year - 1978
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.197803921
Subject(s) - heteronuclear molecule , tetrahedron , cobalt , crystallography , covalent bond , cluster (spacecraft) , chemistry , ligand (biochemistry) , stereochemistry , inorganic chemistry , nuclear magnetic resonance spectroscopy , organic chemistry , biochemistry , receptor , computer science , programming language
A variety of general methods is available for the synthesis of tetrahedral heteronuclear cobalt clusters of type (CO) 9 Co 3 E(L) n (E=hetero element). The size of E has a limiting effect on the existence of such complexes. No compounds (CO) 9 Co 3 E(L) n have so far been prepared in which the covalent radius of E exceeds 1.30 Å;. Elements such as In, Sn, Pb, Sb, or Bi do not fit into the tetrahedral Co 3 E cluster unit and form open complexes E[Co(CO) 4 ] n ( n =3, 4). Structural variations among the heteronuclear clusters are encountered in the presence or absence of carbonyl bridges between the cobalt atoms: hetero atoms E bearing several ligands L favor bridging, whereas those bearing only one ligand or none at all permit terminal bonding of all the CO groups.