中文摘要：

When N-cyanoimido-( O,O-diethyl)phosphonyl/S-methyl thiocarbonate (1) was treated with o-phenylenediamine in the presence of Et3N in ethanol,diethyl benzimidazole-2-yl phos-phonate (2) was obtained and hydrolyzed during the recrys-tallization in MeOH/H2O,generating ethyl benzimidazole-2-yl phosphonate (3).Hie crystal structure of compound 3 was determined by X-ray diffraction method.The crystals belong to monoclinic,space group C2/c,a = 1.78408(18) ,6 = 0.83725(9),c= 1.67401(18) nm,β= 118.997(2),V = 2.1870(4) nm3,Z = 8,Dc=1.374 g/cm3,F(000)=944.The final R and wR are 0.0499 and 0.1436,respectively.The mechanism of the above reaction is also discussed.

英文摘要：

When N-cyanoimido-(O,O-diethyl)phosphonyl/S-methyl thiocarbonate (1) was treated with o-phenylenediamine in the presence of Et3N in ethanol, diethyl benzimidazole-2-yl phosphonate (2) was obtained and hydrolyzed during the recrystallization in MeOH/H2O, generating ethyl benzimidazole-2-yl phosphonate (3). The crystal structure of compound 3 was determined by X-ray diffraction method. The crystals belong to monoclinic, space group C2/c, a = 1.78406(18), b = 0. 83725(9), c= 1.67401(18) nm, β= 118.997(2)°, V = 2. 1870(4) nm3Z = 8, Dc = 1.374 g/cm3, F(000) = 944. The final R and wR are 0.0499 and 0.1436, respectively. The mechanism of the above reaction is also discussed.