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A Novel Electron Count and Metal–Metal Multiple Bonding in Trigonal Prismatic Clusters
Author(s) -
Wheeler Ralph A.,
Hoffmann Roald
Publication year - 1986
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.198608221
Subject(s) - antibonding molecular orbital , valence electron , electron , metal , metallic bonding , cluster (spacecraft) , crystallography , core electron , chemistry , trigonal crystal system , trigonal prismatic molecular geometry , molecular orbital , materials science , atomic physics , crystal structure , molecule , physics , octahedron , atomic orbital , quantum mechanics , organic chemistry , computer science , programming language
The anions Tc 6 Cl 12 2⊖and Tc 6 Cl 14 3⊖have more electrons participating in metal‐metal bonds than any other hexanuclear cluster known so far. Their metal skeletons (32 and 31 electrons, respectively) can be described in terms of the 30e structure 1 . The. surplus electrons occupy a molecular orbital which is strongly antibonding in the TcTc units and weakly bonding between them. The alternative valence structure 2 is conceivable for the hypothetical [Tc 6 Cl 18 ] 6⊖ .