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IN this note we wish to report preliminary results from the analysis of the infra-red spectrum of cyclobutadiene silver nitrate ~4Vg-J NO3 in relation to possible structures for the complex cation. Table 1 shows the spectrum obtained with Unicam SPl.00 and Perkin-Elmer Model 21 spectrophotometers u
THE i&a-red spectum of Co,(CO), was reported by CABLE, NYEIOLM and SHELINE [l] and by FRIEDEL, WENDER, SECUFLER and STERNBERG [2]. They observed in the C-O stretching region three terminal and one bridge carbonyl frequencies and decided on this basis for the truss structure belonging to point group
The rot ati on-vibration spectr um of hydraz ine vapour has bee n measu red fro m 250 t o 750 em-I. Th e t orsional vibration bands arising fr om the t ransition of n: 0 --+ 1, 0 --+ 2 and I --+ 2 were assigned . Th e centres of the bands were loca ted at 3 76 ,74, 665β’9 and 289 '5 cm-1 , respect iv