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Tellurium‐Bridged Manganese Carbonyl Clusters: Synthesis and Structural Transformations of [Te 4 Mn 3 (CO) 10 ] − , [Te 2 Mn 3 (CO) 9 ] 2− , [Te 2 Mn 3 (CO) 9 ] − , and [Te 2 Mn 4 (CO) 12 ] 2−
Author(s) -
Shieh Minghuey,
Chen HorngSun,
Yang HueyYea,
Lin ShuFen,
Ueng ChuenHer
Publication year - 2001
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/1521-3765(20010716)7:14<3152::aid-chem3152>3.0.co;2-b
Subject(s) - cluster (spacecraft) , chemistry , crystallography , manganese , trigonal bipyramidal molecular geometry , octahedron , square pyramidal molecular geometry , pentagonal bipyramidal molecular geometry , paramagnetism , moiety , methanol , stereochemistry , crystal structure , physics , organic chemistry , quantum mechanics , computer science , programming language
The reactions of appropriate ratios of K 2 TeO 3 and [Mn 2 (CO) 10 ] in superheated methanol solutions lead to a series of novel cluster anions [Te 4 Mn 3 (CO) 10 ] − ( 1 ), [Te 2 Mn 3 (CO) 9 ] 2− ( 2 ), [Te 2 Mn 3 (CO) 9 ] − ( 3 ), and [Te 2 Mn 4 (CO) 12 ] 2− ( 4 ). When cluster 1 is treated with [Mn 2 (CO) 10 ]/KOH in methanol, paramagnetic cluster 2 is formed in moderate yield. Cluster 2 is oxidized by [Cu(MeCN) 4 ]BF 4 to give the closo ‐cluster [Te 2 Mn 3 (CO) 9 ] − ( 3 ), while treatment of 2 with [Mn 2 (CO) 10 ]/KOH affords the closo ‐cluster 4 . IR spectroscopy showed that cluster 1 reacted with [Mn 2 (CO) 10 ] to give cluster 4 via cluster 2 . Clusters 1 – 4 were structurally characterized by spectroscopic methods or/and X‐ray analyses. The core structure of 1 can be described as two [Mn(CO) 3 ] groups doubly bridged by two Te 2 fragments in a μ 2 – η 2 fashion. Both [Mn(CO) 3 ] groups are further coordinated to one [Mn(CO) 4 ] moiety. Cluster 2 is a 49 e − species with a square‐pyramidal core geometry. While cluster 3 displays a trigonal‐bipyramidal metal core, cluster 4 possesses an octahedral core geometry.