207689-80-3Relevant academic research and scientific papers
Alkylation, insertion of isocyanides, and intramolecular rearrangement processes in azatantalacyclopentene complexes. X-ray crystal Structure of [TaCp*Me2(CHCHCMe2NAr-K2C,N)] (Cp* - η5-C5Me5
Galakhov, Mikhail V.,Gomez, Manuel,Gomez-Sal, Pilar,Velasco, Patricia
, p. 3552 - 3560 (2008/10/09)
Chloro methyl and dimethyl azatantalacyclopentene complexes were prepared. Reaction of 1a with dibenzylmagnesium leads to the monoalkylated complex. Anisotropic thermal parameters were used in the last cycles of refinement for the nonhydrogen atoms. All c
Alkyl chloro, dialkyl and mixed alkyl derivatives of imido(pentamethylcyclopentadienyl) tantalum(V). X-ray crystal structure of [TaCp*Cp′Cl{N(2,6-Me2C6H3)}], (Cp′=η5-C5H4SiMe3]
Castro, Aurora,Galakhov, Mikhail V.,Gomez, Manuel,Gomez-Sal, Pilar,Martin, Avelino,Royo, Pascual
, p. 185 - 194 (2007/10/03)
[TaCp*Cl2{N(2,6-Me2C6H 3)}] (Cp=η5-C5Me5) reacts with one equivalent of LiR (R=CH2SiMe3, CH2CMe2Ph, CH2CMe3, 2-(CH2NMe2)C6H4, C5H4SiMe3) or 0.5 equivalents of Mg(CH2C6H5)2(THF)2 to give the alkyl chloro complexes [TaCp*ClR{N(2,6-Me2C6H3)}],(R=CH 2SiMe3, 1; CH2CMe2Ph, 2; CH2CMe3, 3; CH2C6H5, 4; 2-(CH2NMe2)C6H4, 5; C5H4SiMe3, 6). When the same reaction was carried out with two equivalents of lithium or one equivalent of magnesium reagent, the corresponding dialkyl derivatives [TaCp*R2{N(2,6-Me2C6H 3)}],(R=CH2SiMe3, 7; CH2CMe2Ph, 8; C6H5, 9; CH2C6H5, 10; CH2CMe3, 11) were obtained. The mixed alkyl derivatives [TaCp*MeR{N(2,6-Me2C6H3)}], (R=CH2SiMe3, 12; CH2CMe2Ph, 13; C6H5, 14; CH2CMe3, 15; 2-(CH2NMe2)C6H4, 16; CH2C6H5, 17; C5H4SiMe3, 18) have been prepared by treatment of solutions containing [TaCp*ClMe{N(2,6-Me2C6H3)}] with one equivalent of lithium or 0.5 equivalents of magnesium reagent. All the new complexes were characterized by the usual IR and NMR spectroscopic methods. The crystal structure of 6 was determined by X-ray diffraction studies. Crystals of 6 are monoclinic, space group P21/c, with Z=4 in a unit cell of dimensions a=12.597(3), b=11.338(2), c=18.297(4) A and β=96.53(3)°. The structure was solved from diffractometer data by a combination of direct and Fourier methods and refined by full-matrix least squares fit on the basis of 4846 observed reflections to R1 and wR2 values of 0.0224 and 0.0574, respectively.
