Sen, MK

Sengupta, AK

IACS Institutional Repository

Investigations in the lnfra-Red.* Part I .  A b s o ~ p t i o n  S ~ C C ~ S U W L  tmd MOICCIII~T Struclnrre of Bora tes (Receiaed for publication, 1st May, 1836). A ~ t u d y  of the near iinfra-red absorption spechi of a few bnmtee Baa been made in the region 6pX5p. The results are in agreement with the predictions of Caesie. The magnitude of the true form constant of the radical under inveatigatinn in comparison to tbat of COs and KO3 shwe that the bond is not locirlisd as in BCls. The slightly positire value of true rigidity revsds further thst its plane configuration i s  not due b repulsion of the oxygen ions alone and  follow^ the qu~tisation more cloeely f b m  NOs or COs radical. It is now well known tbat a radical or a moltvlule of tlw type XO, may possess either rc pgranlidal or a planar mftgtl~1. tion, and hns ~lix vibrational degrees of freedom but only four dietinct fundamental fmquencies. Olic of these ol~msiclndi. to oscillation of tbc X atam relative to the cS, triangle along the 

Investigations in the lnfra-Red: Part I

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