Abstract
Organomercury(II) derivatives of 6-amino penicillinic acid (A) of the type RHgL (B) (R = phenyl (C 6H 5), p-acetoxyphenyl (p-CH 3COOC 6H 4), p-hydroxyphenyl ( p-HOC 6H 4); HL = 6-amino penicillinic acid) have been synthesised. Spectral studies (IR and UV) indicate that the penicillin moiety is bidentate. From thermogravimetric curves, the order and activation energy of the thermal decomposition reaction have been elucidated. The variation of activation energy has been co-related with the nature of substituent on the phenyl ring. The thermal decomposition reaction in each case follows an F 1 type mechanism. From differential thermal analysis the activation energy and the heat of transition for thermal effects have been calculated. The fragmentation pattern has been analysed on the basis of mass spectra.
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