The vibrational spectra of tert-butyl (tert-butylimino)borane ((CH3)3CBNC(CH3)3) and di-tert-butylethyne ((CH3)3CCCC(CH3)3)

<b>Vibrational spectra of <i>t</i>-butyl alcohol, <i>t</i>-butylamine and <i>t</i>-butyl alcohol + <i>t</i>-butylamine binary liquid mixtures</b>

“…Assignments were made on the basis of correlations with vibrations assigned in related molecules. In general, the assignments of the vibrations involving the amino group of Bu t NH 2 follow those given for isopropylamine [2], nbutylamine [4], and the remaining vibrations follow the assignments given for t-butyl(tbutylimino)borane (CH 3 ) 3 CBNC(CH 3 ) 3 and di-t-butylethyne (CH 3 ) 3 CCCC(CH 3 ) 3 [10]. It is apparent from Figures 1 and 2 that the spectra of Bu t OH are very similar to those of Bu t NH 2 .…”

“…Since compounds containing quaternary carbon atoms (t-butyl group) exhibit vibrational modes in the 1200-1255 cm -1 region as a result of the CC 4 skeletal stretchings [12], the 1240-1250 cm -1 and 1210-1220 cm -1 bands of both Bu t OH and Bu t NH 2 are most likely due to similar vibrations involving the C 3 C-N and C 3 C-O moieties. In the Raman spectra of Bu t NH 2 three fairly distinct bands appear around 920 cm -1 which are assigned to characteristic CH 3 rocking frequencies of t-butyl group skeletal stretching modes [10,12]. In Bu t OH, however, only one strong band appears in this region at 914 cm -1 .…”

“…The band at 1320 cm -1 weak in both the Raman and IR spectra is assigned to the NH 2 twisting vibration while the other weak band at 1000 cm -1 is assigned to the symmetric C-N stretching. The remaining three bands are assigned to the CH 3 rocking and C-C symmetric stretching [2,4,10]. The two bands observed at 1240 and ca.…”