Abstract
Based on electron impact and high resolution mass spectroscopic data and metastable ions measurements, fragmentation pathways of title compounds are postulated. The investigation of 13C NMR data indicates a highly hindered interannular delocalization over the imidazole and phenyl rings of these compounds. An excellent correlation are found between the logarithm values of 33P NMR chemical shifts and o parameters of the nuclear substituents on the phenyl ring.