Premium
Dimerization of New T‐shaped Hypervalent Organotellurium(II) Dihalides: Synthesis and Structural Characterization of (PyH)[mesTeIX] (Py = pyridine; mes = mesityl; X = Cl, Br, I)
Author(s) -
Manzoni de Oliveira Gelson,
Faoro Eliandro,
Schulz Lang Ernesto,
Casagrande Gleison Antonio
Publication year - 2006
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200500486
Subject(s) - hypervalent molecule , pyridinium , chemistry , pyridine , hydrogen bond , crystallography , stereochemistry , medicinal chemistry , molecule , iodine , organic chemistry
[mesTe] 2 reacts with iodine in toluene and further with (C 5 H 6 N) + X − (X = I, Br, Cl) to give (PyH)[mesTeI 2 ] ( 1 ), (PyH)[mesTeIBr] ( 2 ) and (PyH)[mesTeICl] ( 3 ). The anionic fragments [(mes)TeI 2 ] and [(mes)TeIBr] of 1 and 2 are assembled as dimers by reciprocal, secondary Te···X interactions, linked also to the pyridinium cations through μ‐NH···X bonding. The anion [(mes)TeICl] − ( 3 ) do not interact with neighboring anionic moieties, achieving also secondary NH···Cl bonding toward the pyridinium cation. The dimerization ability – with attaining of additional interionic hydrogen bridges – of 1 and 2 allow them to be viewed as partially “molecular” and as hypervalent compounds of Te II , for which the observed linearity of the I–Te–X system and the similarity of the Te–X bond distances are expected.