Heavier alkaline earth metal complexes with phosphinoselenoic amides: Evidence of direct M-Se contact (M = Ca, Sr, Ba)

Kottalanka, R K and Naktode, K and Anga, S and Nayek, H P and Panda, Tarun K (2013) Heavier alkaline earth metal complexes with phosphinoselenoic amides: Evidence of direct M-Se contact (M = Ca, Sr, Ba). Dalton Transactions, 42 (14). pp. 4947-4956. ISSN 1477-9226

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We report here a series of heavier alkaline earth metal complexes with a phosphinoselenoic amide ligand using two synthetic routes. In the first route, the heavier alkaline earth metal bis(trimethylsilyl)amides [M{N(SiMe 3)2}2(THF)n] (M = Ca, Sr, Ba) were treated with phosphinoselenoic amine [Ph2P(Se)NH(CHPh2)] (3), prepared by the treatment of bulky phosphinamines [Ph 2PNH(CHPh2)] (1) with elemental selenium in THF, and afforded homoleptic alkaline earth metal complexes of composition [M(THF) 2{Ph2P(Se)N(CHPh2)}2] (M = Ca (7), Sr (8), Ba (9)). The metal complexes 7-9 can also be obtained via salt metathesis route where the alkali metal phosphinoselenoic amides of composition [{(THF)2M'Ph2P(Se)N(CHPh2)}2] (M' = Na (5) and K (6)) were reacted with respective metal diiodides in THF at ambient temperature. The solid state structures of the alkali metal complexes 5-6 and alkaline earth metal complexes 7-9 were established by single crystal X-ray diffraction analysis. In the solid state, alkali metal complexes 5 and 6 are dimeric and form a poly-metallacyclic structural motif. In contrast, complexes 7-9 are monomeric and a direct metal-selenium bond is observed in each case

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IITH Creators:
IITH CreatorsORCiD
Panda, Tarun Khttp://orcid.org/0000-0003-0975-0118
Item Type: Article
Uncontrolled Keywords: Amide ligands; Elemental selenium; Salt metathesis; Single crystal X-ray diffraction analysis; Solid-state structures; Structural motifs; Synthetic routes; Trimethylsilyl
Subjects: Chemistry
Divisions: Department of Chemistry
Depositing User: Team Library
Date Deposited: 01 Dec 2014 07:12
Last Modified: 07 Sep 2017 11:25
URI: http://raiith.iith.ac.in/id/eprint/1078
Publisher URL: https://doi.org/10.1039/c2dt32339g
OA policy: http://www.sherpa.ac.uk/romeo/issn/1477-9226/
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