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Synthesis of trans , trans ‐[MoX 2 py 4 ][MoX 4 py 2 ], trans ‐[MoX 2 py 4 ]Br 3 , and structural identification of trans , trans ‐[MoX 2 py 4 ][MoX 4 py 2 ] (X = Cl, Br; py = pyridine)
Author(s) -
Brenčič J. V.,
Golič L.,
Leban I.,
Rotar R.,
Sieler J.
Publication year - 1996
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.19966221222
Subject(s) - mox fuel , pyridine , chemistry , monoclinic crystal system , cis–trans isomerism , bromine , medicinal chemistry , crystallography , stereochemistry , crystal structure , nuclear chemistry , organic chemistry , plutonium
Trans,trans‐[MoX 2 py 4 ][MoX 4 py 2 ] (X = Cl, A; Br, B; py = pyridine, C 5 H 5 N) are the side products of reaction of between (NH 4 ) 2 [MoX 5 · H 2 O] (X = Cl,Br) with pyridine diluted with methanol. Both trans,trans‐[MoX 2 py 4 ][MoX 4 py 2 ] are monoclinic, P2 1 /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 MoX and MoN (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‐MoX 4 py 2 , which precipitates from the solution. Cation can be isolated from the solution in the form of trans‐[MoX 2 py 4 ]Br 3 (X = Cl, Br). The compounds were also characterised by chemical analysis, infrared spectroscopy and conductivity measurements.