Infrared Intensity of the C — D Stretch of Chloroform-d in Various Solvents

Abstract

Infrared measurements of the frequency and intensity of the C — D stretching and bending motions of CDCl3 in various solvents are presented. The expected relationship between heat of solution and lowered stretching frequency is shown not to extend to CDCl3. There is, however, a correlation between apparent integrated intensity of this band and the extent of interaction in the same solvent. The band is over thirty times as intense in triethylamine as in carbon tetrachloride solution. No large change in the intensity of the bending motion was observed. The infrared spectral properties of chloroform-d are interpreted to indicate molecular interactions similar to hydrogen bonding interactions.

Haloalkane-Aromatic Complexes in the Ground and Excited States Molecular Orbital Calculation

“…However we could also point out from Table 1 that our calculated charges on the chloroform moiety in the various SQ complexes are quite small, consistent with experimental ir results [2], and that our S0 force constants are probably quite reasonable, comparing them to k = 0.27 m d/A obtained [21] from Raman spectra of the 2:1 carbon tetrachloride-benzene complex.…”

“…The 2:1 carbon tetrachloride-benzene complex was calculated to be unstable at any Cplane distance. Table 1 shows the calculated depths of the energy wells, the distance (C-plane) at which each minimum occurs, and the calculated values of (dju/dr) and k (the force constants of the intermolecular vibration), evaluated at the calculated energy minimum by fitting the ju vs. r and E vs. r curves to the parabolas /x = a + b{r -r())+c{r -rQ) 2 and E = 0.5k (r -r0) 2 , using a least squares fit. Calculated charges on the haloalkane moiety at the energy minimum are also given.…”

“…More recent experimental studies to determine the nature of these interactions have employed various experimental methods, such as ir [2], nmr [3], uv absorption spectroscopy [4], calorimetry [5], glc [6], and polarization measurements [7].…”

The CH/π Hydrogen Bond: Implication in Crystal Engineering

“…The association between an aromatic compound and haloforms occurs in a one to one ratio. Support for this suggestion soon followed, by IR [9] and NMR studies [10].…”

'Breaking' and formation of hydrogen bonds by proton donor anesthetics

“…The formation of HB's involving chloroform and similar molecules as proton donors was also established a long time ago (16)(17)(18)(19)(20), including, among many others, HB formation between chloroform and trimethylamine (21)(22)(23)(24)(25).…”