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  • Vibrational spectra and normal coordinate analysis of 4-(dimethylamino)benzaldehyde and selected isotopic derivatives.

Vibrational spectra and normal coordinate analysis of 4-(dimethylamino)benzaldehyde and selected isotopic derivatives.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy (1998-07-17)
G P Kushto, P W Jagodzinski
ABSTRACT

Results of a normal coordinate analysis based on infrared and Raman spectra of six isotopic forms of 4-(dimethylamino)benzaldehyde are reported (DABA, DABA-CDO, DABA-13CDO, DABA-13CHO, DABA-CHO18O, and DABA-3,5-D). Cs point group symmetry has been applied and all motions except the internal rotations of the dimethylamino and the two methyl groups have been used to generate symmetry coordinates. The potential energy distributions have lead to revision and extension of previous assignments. The force field and the forms of the normal modes are in excellent agreement with those reported for similar molecules.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
4-(Dimethylamino)benzaldehyde, 98%
Sigma-Aldrich
4-(Dimethylamino)benzaldehyde, ACS reagent, 99%
Sigma-Aldrich
4-(Dimethylamino)benzaldehyde, suitable for histochemical demonstration of nitro blue tetrazolium reduction in neutrophils
Sigma-Aldrich
4-(Dimethylamino)benzaldehyde, puriss. p.a., reag. Ph. Eur., ≥99% (perchloric acid titration)
Supelco
4-(Dimethylamino)benzaldehyde solution, 10 g/L in isopropanol, for TLC derivatization
Millipore
Kovac′s reagent for indoles, suitable for microbiology
Millipore
Kovac′s reagent for indoles, suitable for microbiology