Synthesis and Crystal Structure of a Charge-transfer Salt [C_5H_(10)NO]_3[PW_(12)O_(40)]·C_5H_9NO·3H_2O

The title compound was synthesized using N-methylpyrrolindone and H3PW12O40·nH2O as starting materials,and identified by elemental analyses,IR spectra,MS and single crystal X-ray diffractometry.The crystal belongs to triclinic,space group Pī,with a=1.335(2) nm,b=1.374(2) nm,c=1.826(2) nm,α=98.92(2)°,β=107.7(2)°,γ=109.9(2)°,V= 2.873(1) nm3,Z=2,Dc=3.840 Mg/m3,μ=24.05 mm-1,F(000)=2 926,R1 =0.063 2,wR2 =0.140 3.In the title compound,the heteropoly anions still reserve their Keggin structures,which combines the cations through static electric force.