THE FORCE CONSTANTS OF SOME POLYATOMIC MOLECULES AND IONS.

Abstract

The force constants of the molecules phosphorous oxybromide and thiophosphoryl bromide and the ions GaBr4=, InBr4=, TlBr4= and CdBr4= have been evaluated using the known iundamental vibration frequencies. The matrix method of Wilson wns used in all the cases. The value of the P = Oforce constant was nearly the same as found in the molecule OPCIa and the P-Br force constant was also nearly the same in OPBra and SPBra. However, there war some difference between the values of the P = S force constant in SPBra and SPCIa.