VIBRATIONAL-SPECTRA OF GASEOUS AND LIQUID TETRAKIS(DIMETHYLAMIDO)TITANIUM, TI[N(CH3)2]4, AND TETRAKIS(DIETHYLAMIDO)TITANIUM, TI[N(C2H5)2]4

The IR spectra of gaseous and the Raman spectra of liquid tetrakis(dia lkylamido)titanium, Ti(NR2)4 (R = CH3 or C2H5), have been measured and an assignment has been made according to S4 symmetry for the molecule and local C2 symmetry for the -NR, group. Universal force field calcu lations have been performed which confirm the local C2 symmetry for th e -N(C2H5)2 group.