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Synthesis, crystal structure and electrochemical properties of three isocloso eleven‐vertex ferrocenecarboxylate ruthenaborane clusters
Author(s) -
Dou Jianmin,
Guo Qingliang,
Wu Libin,
Li Dacheng,
Wang Daqi,
Wang Huaisheng,
Li Yantuan
Publication year - 2006
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.1031
Subject(s) - chemistry , ruthenium , crystal structure , crystallography , stereochemistry , ring (chemistry) , cluster (spacecraft) , metal , vertex (graph theory) , electrochemistry , octahedron , catalysis , combinatorics , graph , biochemistry , mathematics , organic chemistry , electrode , computer science , programming language
The reaction of [RuCl 2 (PPh 3 ) 3 ] with closo ‐[B 10 H 10 ] 2− and C 5 H 5 FeC 5 H 4 COOH (FcCO 2 H) in refluxing CH 2 Cl 2 solution affords three ruthenaborane clusters: [PPh 3 (H 2 O)(FcCO 2 )RuB 10 H 8 Cl] (1), [(PPh 3 ) 2 ClRu(PPh 3 )(FcCO 2 )RuB 10 H 9 ]·0.5CH 2 Cl 2 (2 × 0.5CH 2 Cl 2 ) and [PPh 3 (FcCO 2 ) 2 RuB 10 H 8 ] (3). All of these compounds are characterized by FT‐IR, NMR spectroscopic techniques, elemental analysis and single‐crystal X‐ray analysis. They are all based on a closo ‐type 1:2:4:2:2 {RuB 10 } stack with the metal occupying the unique six‐connected apical position and can be considered as having isocloso structures derived from the complete capping of the open face of an arachano geometry to give a completely closed deltahedral cluster. Compounds 1 and 2 both have an exo ‐polyhedral ferrocenecarboxylate that is attached with one {RuO} and one {BO} bond each, resulting in one exo ‐cyclic five‐membered RuOCOB ring. There is in addition one exo ‐polyhedral ruthenium atom bonded to the center {RuB 10 } cluster via one {RuRu} linkage and two {RuH µ B} bridges, which forms a closed exo ‐polyhedral tetrahedron configuration in compound 2. Compound 3 has two exo ‐polyhedral ferrocenecarboxylates to form two five‐membered RuOCOB rings engendering a symmetrical conformation. All of these new 11‐vertex ruthenaboranes can be considered as having isocloso structures derived from the complete capping of the open face of an arachano geometry to give a completely closed deltahedral cluster. Copyright © 2006 John Wiley & Sons, Ltd.