Cu(NH3)2(FOX-7)2的晶体结构和热行为

用l,1-二氨基-2,2-二硝基乙烯的钾盐K(FOX-7)·H2O]和硝酸铜在氨水体系中合成了Cu( NH3)2(FOX-7)2,并培养得到了单晶.该晶体为单斜晶系,空间群P21/c,a=0.68818(7)nm,b=O.73083 (8) nm,c=1.319 66(14)nm,β=95.986°,V=0.6600...

Crystal Structure and Thermal Behavior of Cu(NH_3)_2(FOX-7)_2

A metal coordination compound,Cu(NH3)2(FOX-7)2,was synthesized by mixing 1,1-diamino-2,2-dinitroethylene potassium salt K(FOX-7)·H2O] and Cu(NO3)2·3H2O in aqua ammonia.Single crystals suitable for X-ray measurement were obtained by slow evaporation in aqua ammonia at room temperature.Crystals of Cu(CH3)2(FOX-7)2 revealed the following parameters:monoclinic,space group P21/c,a=0.68818(7)nm,b=0.73083(8)nm,c=1.319 66(14) nm,β=95.986°,V=0.660 09(12)nm3,Dc=1.972 g/cm3,μ=0.862 mm-1,F(000)=199,Z=2,R1=0.034 4,wR2=0.098 9.Thermal decomposition behavior of Cu(NH3)2(FOX-7)2 was studied under the non-isothermal conditions by DSC method.The enthalpy,apparent activation energy and pre-exponential constant of the first exothermic decomposition reaction are-439.0 J/g,140.2 kJ/mol and 14.78 s-1,respectively.The critical temperature of thermal explosion for Cu(NH3)2(FOX-7)2 is 152.86 ℃.Cu(NH3)2(FOX-7)2 presents lower thermal stability than FOX-7.