RT info:eu-repo/semantics/article
T1 Alkyl chloro, dialkyl and mixed alkyl derivates of imido(pentamethylcyclopentadienyl) tantalum(V). X-ray crystal structure of [TaCp*Cp'Cl{N(2,6-Me2C6H3)}], [Cp'= η5-C5H4SiMe3]
A1 Castro Correro, Aurora
A1 Galakhov, Mikhail V.
A1 Gómez Rubio, Manuel
A1 Gómez Sal, Pilar
A1 Martín Alonso, Avelino
A1 Royo Gracia, Pascual
K1 Tantalum
K1 Alkyl
K1 Imido
K1 Pentamethylcyclopentadienyl
K1 Complexes
K1 Ciencia
K1 Química inorgánica
K1 Science
K1 Chemistry, inorganic
AB [TaCp*Cl2{N(2,6-Me2C6H3)}] (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=CH2SiMe3, 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-Me2C6H3)}],(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) Å 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.
PB Elsevier
SN 0022-328X
YR 1998
FD 1998
LK http://hdl.handle.net/10017/4280
UL http://hdl.handle.net/10017/4280
LA eng
DS MINDS@UW
RD 26-abr-2024