ISSN:
0044-2313
Keywords:
molybdenum(III) chloro and bromo pyridine complexes
;
preparation
;
crystal structures
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Darstellung von trans, trans-[MoX2py4][MoX4py2], trans-[MoX2py4]Br3 und Struktur von trans, trans-[MoX2py4][MoX4py2] (X = Cl, Br; py = Pyridin)Trans,trans-[MoX2py4][MoX4py2] (A: X = Cl; B: X = Br; py = Pyridin, C5H5N) sind die Nebenprodukte der Reaktion zwischen (NH4)2[MoX5 · H2O] (X = Cl, Br) und mit Methanol verdünntem Pyridin. Beide Verbindungen kristallisieren monoclin, P21/n mit Z = 2 und A: a = 12.568(1), b = 9.430(1), c = 14.952(1) Å und β = 100.81(1)°; B: a = 12.551(2), b = 9.533(2), c = 15.366(2) (Å) und β = 99.35(1)°.Die Kationen und Anionen sind Symmetriezentren. Die Ebenen der trans zueinander angeordneten Pyridin-Moleküle sind planparallel. Mittlere Mo—X- und Mo—N(Pyridin)-Abstände sind: (Kation) 2.41, 2.21 Å (A); 2.54, 2.21 Å (B); (Anion) 2.44, 2.20 Å (A); 2.58, 2.20 Å (B).Der anionische Teil kann mit Brom zu trans-MoX4py2 oxydiert werden. Gleichzeitig sind Kationen als trans-[MoX2py4]Br3 isolierbar.Die Verbindungen wurden auch durch die chemische Analyse, Infrarot-Spektroskopie und Konduktometrie charakterisiert.
Notes:
Trans,trans-[MoX2py4][MoX4py2] (X = Cl, A; Br, B; py = pyridine, C5H5N) are the side products of reaction of between (NH4)2[MoX5 · H2O] (X = Cl,Br) with pyridine diluted with methanol.Both trans,trans-[MoX2py4][MoX4py2] are monoclinic, P21/n space group, with z = 2 and: a = 12.568(1), b = 9.430(1), c = 14.952(1) Å and β = 100.81(1)° (A); a = 12.551(2), b = 9.533(2), c = 15.366(2) (Å) and β = 99.35(1) (B).Cations and anions are located on the symmetry centers and have eclipsed conformation of the trans located pyridine ligands. Average Mo—X and Mo—N (pyridine) bonds are; (cation) 2.41, 2.21 Å (A); 2.54, 2.21 Å (B); (anion) 2.44, 2.20 Å (A); 2.58, 2.20 Å (B).Anionic part of the compounds can be oxidised by bromine to trans-MoX4py2, which precipitates from the solution. Cation can be isolated from the solution in the form of trans-[MoX2py4]Br3 (X = Cl, Br).The compounds were also characterised by chemical analysis, infrared spectroscopy and conductivity measurements.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19966221222
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