Vibrational spectra and modified valence force field for N,N-methylenebisacrylamide

611-616Raman and Fourier transform infrared (FTIR) spectra of N,N-methylenebisacrylamide have been recorded. A 35-parameter modified valance force field has been evaluated using 38-in-plane vibrational frequencies of the molecule. Unambiguous vibrational assignments have been made using eigenvectors and potential energy distributions computed in the process

INFRARED AND RAMAN SPECTRA, NORMAL COORDINATE ANALYSIS AND TRANFERABILITY OF FORCE CONSTANTS OF SOME MONONITRO SUBSTITUTED MOLECULES

Author Institution: University P.G. College, Kakatiya UniversityThe Raman and Fourier transform infrared (FTIR) spectra of p-, m- and o- nitrobenzamides, p-, m- and o- nitrobenzaldehydes and p-, m- and o- nitrotoluenes were measured. Raman polarization measurements were made wherever possible. A normal coordinate analysis was carried out for both in-plane and out-of plane vibrations of these molecules using 111-parameter modified valence force field. An overlay least-squares technique was employed to refine the force constants using 316 frequencies of nine molecules. The reliability of these force constants was tested by making a zero-order calculation for both in-plane and out-of plane vibrations of p-, m- and o- methyl benzaldehydes; 3,5,-dichloro-p-anisamide, 3,5,-dibromo-p-anisamide and 3,5-dibromo-4-hydroxy benzamide; 4-chloro-3-nitrotoluene, 2-bromo-4-nitrotoluene and 2-bromo-5-nitrotoluene. Unambiguous vibrational assignments of all the fundamentals were made by using the potential energy distributions and eigen vectors

VIBRATIONAL ANALYSIS AND VALENCE FORCE FIELD FOR NITROTOLUENES, DIMETHYLANILINES AND SOME SUBSTITUTED METHYLBENZENES

Author Institution: Department of Physics, Kakatiya University, Warangal-506 009, A.P., India Email: [email protected]; Department of Physics, Government Degree College, Mancherial-504 208, A.P., India; Department of Physics, Varada Reddy College of Engineering, Ananthasagar, Warangal-506 371, A.P.,IndiaThe Fourier transform infrared (FTIR) and Raman spectra of 2-amino-4-nitro-toluene; 2-amino-5-nitrotoluene; 2,4-dimethylaniline; 2,5-dimethylaniline; 2,6-dimethylaniline; 1,2,4-trimethylbenzene; 1,3,5-trimethylbenzene and pentamethyl-benzene have been recorded in the range 4000-400 $cm^{-1}$ and 4000-30 $cm^{-1}$, respectively. A normal coordinate analysis was carried out for both in-plane and out-of-plane vibrations of these molecules using an 81-parameter modified valence force field. The force constants were refined using 251 frequencies of eight molecules in the Overlay least-square technique. The reliability of force constants was tested by making zero-order calculations for both in-plane and out-of plane vibrations for five related molecules. The potential energy distribution (PED) and eigen vectors calculated in the process were used to make unambiguous vibrational assignment of all the fundamentals

PATELLAR TUBERCULOSIS- A CASE REPORT

CASE PRESENTATION A 21-year-old male came with complaints of left knee pain with progressive swelling for 3 months. Patient had history of 5 Kg weight loss in past 3 months with intermittent fever. There was history of cough without sputum. Patient belonged to low socio-economic status with no family history of tuberculosis. On local examination, left knee swelling with mild tenderness were noted. There were no external discharging sinuses. On palpation there is doughy feel of the swelling with tenderness over patella. There was normal range of movements of the left knee joint. Laboratory investigations revealed hemoglobin level of 11 gm /dl, total leucocyte count of 8700 /mm3 with lymphocytosis erythrocyte sedimentation rate was 48 mm (Westergren) in the first hour. C-reactive protein was 11 mg/L. Serology for HIV & HBsAg were negative. Ultra sound abdomen and pelvis was done which shows bilateral inguinal lymphadenopath

Bismuth triflate as novel and efficient catalyst for the synthesis of β-aminosulfides

Aziridines undergo ring opening readily with various thiols in the presence of 5 mol% bismuth triflate under very mild reaction conditions to afford the corresponding β-aminosulfides in excellent yields with high regioselectivity

LiClO<SUB>4</SUB>-catalyzed cleavage of aziridines with thiols: a facile synthesis of &#946;-aminosulfides

Aziridines react smoothly with thiols in the presence of catalytic amount of lithium perchlorate under essentially mild and neutral reaction conditions to afford the corresponding β-aminosulfides in high yields with high regioselectivity

Reductive etherification of carbonyl compounds with alkyl trimethylsilylethers using polymethylhydrosiloxane (PMHS) and catalytic B(C<SUB>6</SUB>F<SUB>5</SUB>)<SUB>3</SUB>

A facile synthesis of symmetrical and unsymmetrical ethers is achieved by reductive coupling of carbonyl compounds with alkoxysilanes. This reaction is performed using inert polymethylhydrosiloxane as the hydride source and B(C6F5)3 as the catalytic activator of the PMHS. A facile synthesis of symmetrical and unsymmetrical ethers is achieved by reductive coupling of carbonyl compounds with alkoxysilanes. This reaction is performed using inert polymethylhydrosiloxane as the hydride source and B(C6F5)3 as the catalytic activator of the PMHS