One complex with a zwitterionic dicarboxylate ligand,[Mn(L)(N3)]n1(L=1-carboxymethylpyridinium-3-carboxylate),was synthesized and structurally characterized.Complex 1crystallizes in triclinic,space group P1 with a=7.570(2),b=7.808(2),c=9.232(3),=94.450(19)o,V=489.0(3)3,Z=2,Mr=277.11,Dc=1.882 g/cm3,F(000)=278,μ=1.359 mm-1,S=1.021,the final R=0.0509 and wR=0.1149 for 2236 observed reflections with I>2(I).Complex 1 consists of two-dimensional coordination layers in which the anionic uniform chains with mixed triple bridges(one end-on(EO)azide and two syn-syn carboxylates)are cross-linked by the flexible cationic N-methylpyridinium spacers.Magnetic studies demonstrated that the triple bridge in 1 transmits antiferromagnetic coupling between the Mn(II)ions. One complex with a zwitterionic dicarboxylate ligand, [Mn (L) (N3)] n1 (L = 1-carboxymethylpyridinium-3-carboxylate), was synthesized and structurally characterized. Complex 1crystallizes in triclinic, space group P1 with a = 7.570 , b = 7.808 (2) c = 9.232 (3) = 94.450 (19) o V = 489.0 (3) 3 Z = 2 Mr = 277.11 Dc = 1.882 g / cm3 F = 278, μ = 1.359 mm-1, S = 1.021, the final R = 0.0509 and wR = 0.1149 for 2236 observed reflections with I> 2 (I) .Complex 1 consists of two-dimensional coordination layers in which the sub- with mixed triple bridges (one end-on (EO) azide and two syn-syn carboxylates are cross-linked by the flexible cationic N-methylpyridinium spacers. Magnetic studies demonstrated that the triple bridge in 1 transmitting antiferromagnetic coupling between the Mn ) ions.