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Pyridineselenolate Complexes of Tin and Lead: Sn(2-SeNC(5)H(4))(2), Sn(2-SeNC(5)H(4))(4), Pb(2-SeNC(5)H(4))(2), and Pb(3-Me(3)Si-2-SeNC(5)H(3))(2). Volatile CVD Precursors to Group IV-Group VI Semiconductors

Pyridineselenolate Complexes of Tin and Lead: Sn(2-SeNC(5)H(4))(2), Sn(2-SeNC(5)H(4))(4), Pb(2-SeNC(5)H(4))(2), and Pb(3-Me(3)Si-2-SeNC(5)H(3))(2). Volatile CVD Precursors to Group IV-Group VI Semiconductors

Yifeng Cheng, T. J. Emge, J. G. Brennan

Inorg Chem. 1996 Jan 17;35(2):342-346.

PMID: 11666214

Abstract:

Pyridineselenolate forms stable homoleptic coordination compounds of Sn(II), Sn(IV), and Pb(II). The complexes can be prepared either by metathesis or by insertion of the metal into the Se-Se bond of dipyridyl diselenide, and they are soluble in coordinating solvents such as pyridine. Isolation of the Pb(II) complex from both Pb(0) and Pb(IV) starting materials indicates that the pyridineselenolate ligand cannot stabilize Pb(IV). The compounds all sublime intact and decompose at elevated temperatures: the divalent complexes give MSe (M = Sn, Pb), while the Sn(IV) compound delivers SnSe(2). In order to isolate a crystalline Pb compound, the 3-trimethylsilyl-2-pyridineselenolate ligand was prepared. Attachment of the Me(3)Si functional group increases compound solubility, and leads to the isolation of crystalline Pb(3-Me(3)Si-2-SeNC(5)H(4))(2). The structure of [Sn(2-SeNC(5)H(4))(2)](2) (1) was determined by single-crystal X-ray diffraction and shown to be a dimer, with one chelating pyridineselenolate per Sn(II) and a pair of pyridineselenolates that asymmetrically span the two metal centers to form an eight membered (-Sn-Se-C-N-Sn-Se-C-N-) ring, with weak Sn-Se interactions connecting the dimeric units. Crystal data for 1 (Mo Kalpha, 298(2) K): orthorhombic space group Pbca, a = 8.214(1) Å, b = 21.181(3) Å, c = 14.628(2) Å.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP1138444015	2-Chloro-4-iodo-3-(trimethylsilyl)pyridine		1138444-01-5	Price
AP1142191852	6-Bromo-2-chloro-3-(trimethylsilyl)pyridine		1142191-85-2	Price

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