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https://www.ias.ac.in/article/fulltext/jcsc/128/07/1025-1032

Molybdenum; thioacetate; sulfur; borate; ferrocene.

Reactivity of [Cp*Mo(CO)₃Me], 1 with various chalcogenide ligands such as Li[BH₂E₃] andLi[BH₃EFc]] (E = S, Se or Te; Fc = (C₅H₅-Fe-C₅H&#8324)) has been described. Room temperature reaction of 1 with Li[BH₂E₃] (E = S and Se) yielded metal chalcogenide complexes [Cp*Mo(CO)₂(ŋ2-S₂CCH3)], 2 and [Cp*Mo(CO)₂(ŋ1-SeC₂H₅)], 3. In compound 2, {Cp*Mo(CO)2} fragment adopts a four-legged piano-stool geometry with a η2-dithioacetate moiety. In contrast, treatment of 1 with Li[BH3(EFc)] (E = S, Se or Te; Fc = C₅H₅-Fe-C₅H₄) yielded borate complexes [Cp*Mo(CO)₂(μ-H)(μ-EFc)BH₂], 4-6 in moderate yields. Compounds 4-6 are too unstable and gradual conversion to [{Cp*Mo(CO)₂}₂(μ-H)(μ-EFc] (7: E = S; 8: Se) and [{Cp*Mo(CO)₂}₂(μ-TeFc)₂], 9 happened by subsequent release of BH₃. All the compounds have been characterized by mass spectrometry, IR, multinuclear NMR spectroscopy and structures were unequivocally established by crystallographic analysis for compounds 2, 3 and 7.

RONGALA RAMALAKSHMI KOUSHIK SAHA ANAMIKA PAUL SUNDARGOPAL GHOSH

Published

1 July 2016

Manuscript received

18 March 2016

Manuscript revised

3 May 2013

Accepted

4 May 2016

• JCSC_128_7_1025_1032_SI_a.doc
• JCSC_128_7_1025_1032_SI_b.pdf
• JCSC_128_7_1025_1032_SI_c.pdf
• JCSC_128_7_1025_1032_SI_d.pdf