Microwave-assisted synthesis and sublimation enthalpies of hemiporphyrazines
It was established that microwave irradiation solvent-free processing of 2,6- diaminopyridine or 1,3-phenylenediamine with phthalonitrile or 4-tert-butylphthalonitrile led to corresponding hemiporphyrazines with sufficiently high yields and a huge reduction in the time required for synthesis, from 8-12 h to 20 min. The data of IR and UV-vis spectroscopies and elemental analysis of the final products were found to be similar to those described in literature. The obtained hemiporphyrazines were characterized by 1H and 13C NMR data. We applied the Knudsen effusion method with mass spectrometric control of vapor composition. The mass spectrometric investigations established that the macrocyclic compounds give a stable stream of particles and their enthalpies of sublimation were estimated by the second law of thermodynamics.
Kuznetsova, Aleksandra S.,Pechnikova, Nadezhda L.,Zhabanov, Yuriy A.,Khochenkov, Aleksey E.,Koifman, Oscar I.,Aleksandriiskii, Victor V.,Islyaikin, Mikhail K.
Get Best Price for246-42-4(1Z,8Z,16Z,23Z)-2,8,17,23,31,33-hexaazaheptacyclo[22.6.1.1~3,7~.1~9,16~.1~18,22~.0~10,15~.0~25,30~]tetratriaconta-1,3(34),4,6,8,10,12,14,16,18(32),19,21,23,25,27,29-hexadecaene (non-preferred name)