2-氨基-4, 6-二甲基嘧啶与锌盐配合物的制备及生成焓测定

Thepyrimidinesasaclassareknowntopossessextraordinarybiologicalpropertiesthataregenerallydistinguishedqualitativelybytheirapplicationsinpesticide,herbicide,bactericide,andmedicineinter-mediates犤1犦.Asurveyoftheseapplicationsandanum-beroftherelatedvariationsthataredevelopedrecent-ly,suchastheextraordinaryeffectiveherbicideofsulfonylsulfourea,revealsthebroadbiologicalimpor-tancejustbecauseofthewideoccurrenceofpyrimi-dinesringsystemsinthesemolecules犤2犦.Ithasbeenshownthatthemedicineintermediates…

Preparation and the Standard Enthalpy of Formation on 2-Amino-4, 6-dimethyl-pyrimidine and the Related Complexes of Zinc

The complexes of zinc chloride and zinc nitrate with 2-amino-4, 6-dimethyl-pyrimidine (ADMP) were preparedthrough reflux in alcohol. The compositions of the complexes Zn(ADMP)2Cl2 (b) and Zn(ADMP)2(NO3)2 @ 4H2O(c) were determined by chemical and elemental analyses. The complexes were characterized by IR, XPS, 1H NMRand TG-DTG techniques. The constant-volume combustion energies of ADMP and the complexes, △cE, weredetermined by a precise rotating bomb calorimeter at 298. 15K. They were ( -3664. 53 + 1.18) kJ @ mol-1,( - 7130. 94 + 3.69) kJ @ mol-1, and ( - 7637. 87 + 5.71 ) kJ @ mol-1. Their standard enthalpies of combustion,△chΘm, and standard enthalpies of formation, △fHΘm, were calculated. They were ( -3666.39 + 1. 18)kJ @ mol-1,(-7129.70+3.69)kJ@ mol-1, (-7632.91 ±5.71)kJ@mol-1and (19.09±1.43)kJ@mol-1, (-411.96±4.03)kJ@mol-1, (-1153.28±6.02)kJ@mol-1.