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Title: FTIR, FT Raman spectra and normal coordinate analysis of hydralazine
Authors: Gunasekaran, S
Seshadri, S
Muthu, S
Keywords: Fourier transform infrared spectrum;Fourier transform Raman spectrum;Hydralazine;Normal coordinate analysis;Potential energy distribution
Issue Date: May-2006
Publisher: NISCAIR-CSIR, India
IPC Code: G01J3/00
Abstract: Hydralazine (C8H8N4.HCI) is chemically known as 1-hydrazinophthalazine mono hydrochloride. It is used as an antihypertensive agent. In the present investigation, normal coordinate analysis has been carried out for the molecule of the title compound using fundamental modes of vibration observed in infrared and Raman spectroscopy. The vibrational modes are classified into A' and A” irreducible representations and are distributed as Гvib=35 A'+19 A” based on Cs, point group symmetry associated with the structures. In the present work, only 18 A' and 12 A” normal modes are considered due to complexity of the molecule. A systematic set of orthonormal symmetry co-ordinates has been constructed. Wilson's F-G matrix method has been adopted for the normal coordinate analysis. A satisfactory vibrational band assignment has been made by using the FTIR and FT Raman spectra of the compounds.
Page(s): 360-366
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.44(05) [May 2006]

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