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SSN : 0971 - 3093

Vol  1, No. 1, January, 1992

Asian Journal of Physics                                                                                                                       Vol. 1, No 1 (1992)

Opening Issue of AJP

Vol 1, No 1, 1992


Hyperfine structure in the electronic Raman spectrum of 79Br and 18Br                                                                                                                                 1

M. Ganz and W Kiefer

Phase transformations of monochloroacetic acid with aromatic hydrocarbons as impurities                                                                                                   9

B Amitha, S K Roy and J Uchil

Bond properties of iodine-pyridine complexes using Raman band parameters                                                                                                                        16

A Bigotto, A N Pandey, D R Singh and Sanyam Bhardwaj

Lattice dynamics of transition metal oxide NiO using three body shell model                                                                                                                         21

S Mohan and T. Radjakoumar

Estimation of excited state electric dipole moments of some trisubstituted benzenes from the solvent effect on their electronic spectra                               26

M K Aralakkanavar, P R Jeeragal, G B Kalakoti and M A Shashidhar

Electrical conductivity of the system Ni1-x Gex Fe2O4                                                                                                                                                              33

H N Pandya and R G Kulkarni


Critical wave vector for collective electron oscillations in solids                                                                                                                                              40

O K Harsh, K C M Shukla and Tapasi Dhar

Infrared study of pyridine-p-tolyl urea                                                                                                                                                                                       44

A Natrajan, C R Gopinath and C Delano Barnabas Ilango

Polarizabilities, susceptibilities and electron ionization cross-sections of five membered ring compounds                                                                             47

J R Chopra and U S Arora

Spectral studies of some new Co(II) complexes                                                                                                                                                                         49

Suresh K Agarwal, T K Pant, D K Tyagi and G P Pokhariyal

Bond polarizability derivatives of some polyatomic molecules                                                                                                                                                 51

H P Mital, Y C Sharma and R K Sharma

Spectral studies of some new lanthanide(III) iodide complexes                                                                                                                                                53

R K Agarwal

Vapour phase infrared spectra of o-aminobenzonitrile                                                                                                                                                               56

S L Gupta and Babu lal

Laser Raman and infrared spectra of 3,5-di-fluorobenzonitrile                                                                                                                                                 58

G Bottura, Sushma Arora, J K Gupta and V K Rastogi

Asian Journal of Physics                                                                                                                      Vol 1, No 1 (1992), 56-57


Vapour phase infrared spectrum of o-aminobenzonitrile

S L Gupta and Babu Lal*

Department of Physics M M (PG) College
Modinagar-201 204, India


Recently Rastogi et al have reported the infrared spectra of o-amino­benzonitrile in solid phase. As the compound was highly fluorescent, its Raman spectra could not be recorded and hence the assignments made by them could not be compared with the Raman data. Therefore, in order to have a consistent interpretation of the vibrational frequencies of this molecule, we have recorded the IR spectrum of this compound in vapour phase and the results are reported in the present note. The IR spectrum was recorded with Jasco spectrophotometer model FTIR/7000 by warming the powder substance in a variable T cell and warming the KBr windows of the cell to avoid condensation of the gas. About 0.5 g of the substance (H2NC6H4CN; FW 118.14; mp 47-49°C; bp 267-268°C) was introduced in a 10 cm quartz cell with KBr windows, which was evacuated and sealed and temperature was controlled by two thermocouples. The IR spectrum is shown in fig 1.

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Fig. 1. Vapour phase IR spectrum of o-aminobenzonitrile

Out of total 39 normal modes of vibration of this molecule, only 15 modes could appear in the vapour phase. Further, a comparison of the observed vapour phase spectrum with the spectra in the liquid or solid phase shows that the frequency or band width of most of the bands observed does not change markedly in the vapour phase. An attempt was also made to record the laser Raman spectrum of the substance by varying the laser powers, but it was not worth mentioning. The assignment of the observed bands (Table 1) are in agreement with the data available for related molecules. 1,3

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1.  Rastogi V K, Mital H P, Sharma S N & Chattopadhyay S, Indian J Phys, 65B (1991) 356.

2.  Rastogi V K, Jain D K and Sharma Y C, Asian JChem, 3 (1991) 113.

3.  Rastogi V K, Mital H P, Sharma Y C & Bottura G, Procd XII Int conf on Raman spectroscopy, (John Wiley & Sons) 1990, p. 176.


[Received 10.10.91; accepted 9.12.91]


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