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Dihalodimethyltin(IV) complexes of 2‐(pyrazol‐1‐ylmethyl)pyridine
Author(s) -
ÁlvarezBoo Pedro,
Sergio Casas José,
Castiñeiras Alfonso,
Delfina Couce María,
Freijanes Eduardo,
Novoa Eva,
Sordo José
Publication year - 2003
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.494
Subject(s) - chemistry , pyridine , tin , ligand (biochemistry) , halogen , raman spectroscopy , crystallography , pyrazole , medicinal chemistry , atom (system on chip) , stereochemistry , organic chemistry , biochemistry , alkyl , receptor , physics , computer science , optics , embedded system
Reaction of dichloro‐ and dibromodimethyltin(IV) with 2‐(pyrazol‐1‐ylmethyl)pyridine (PMP) afforded [SnMe 2 Cl 2 (PMP)] and [SnMe 2 Br 2 (PMP)] respectively. The new complexes were characterized by elemental analysis and mass spectrometry and by IR, Raman and NMR ( 1 H, 13 C) spectroscopies. Structural studies by X‐ray diffraction techniques show that the compounds consist of discrete units with the tin atom octahedrally coordinated to the carbon atoms of the two methyl groups in a trans disposition (SnC = 2.097(5), 2.120(5) Å and 2.110(6), 2.121(6) Å in the chloro and in the bromo compounds respectively), two cis halogen atoms (SnCl = 2.4908(16), 2.5447(17) Å; SnBr = 2.6875(11), 2.7464(9) Å) and the two donor atoms of the ligand (SnN = 2.407(4), 2.471(4) Å and 2.360(5), 2.455(5) Å). In both cases, the SnN(pyridine) bond length is markedly longer than the SnN(pyrazole) distance. Copyright © 2003 John Wiley & Sons, Ltd.