Synthesis and Characterization of (2,4,6-Trimethylphenylimido)molybdenum Complexes. X-ray Crystal Structures of (L(OEt))Mo(Nmes)(2)Cl, (L(OEt))Mo(Nmes)Cl(2), and MoCl(3)(Nmes)(depe) (mes = 2,4,6-Trimethylphenyl, L(OEt) = (eta-C(5)H(5))Co{P(O)(OEt)(2)}(3), depe = Et(2)PCH(2)CH(2)PEt(2)).
The bis(imido) complex MoCl(2)(Nmes)(2)(dme) (1) (mes = 2,4,6-trimethylphenyl, dme = 1,2-dimethoxyethane) has been used as the starting material for the preparation of the compounds (L(OEt))Mo(Nmes)(2)Cl (2) (L(OEt) = (eta-C(5)H(5))Co{P(O)(OEt)(2)}(3)) and Mo(Nmes)(2)(acac)(2) (5), as well as for the synthesis of the mixed oxo-imido MoCl(2)(Nmes)(O)(dme) (6), the latter reaction involving conproportionation of 1 and MoCl(2)(O)(2)(dme). Similarly, the paramagnetic mono(imido) species Mo(Nmes)Cl(3)(dme) (11) can also be obtained from 1 by interaction with MoCl(4)(THF)(2) (THF = tetrahydrofuran) in refluxing dme. Compounds 6 and 11 are suitable sources for the synthesis of other diamagnetic mixed oxo-imido and paramagnetic mono(imido) compounds, respectively. Three of the newly synthesized complexes, namely, (L(OEt))Mo(Nmes)(2)Cl (2), (L(OEt))Mo(Nmes)Cl(2) (12), and MoCl(3)(Nmes)(depe) (14) (depe = Et(2)PCH(2)CH(2)PEt(2)) have been characterized by X-ray crystallography.
Galindo
Agustín
A
Instituto de Ciencia de Materiales, CSIC, Serrano 113, 28006 Madrid, Spain.
Montilla
Francisco
F
Pastor
Antonio
A
Carmona
Ernesto
E
Gutiérrez-Puebla
Enrique
E
Monge
Angeles
A
Ruiz
Caridad
C