Using the ligand 4-sulfonyl-2,6-naphthalenedicarboxylate (SNDC),a coordination compound [Co(H2O)6]2 [Co(SNDC)2(H2O)4]·4H2O (1) was synthesized and characterized by elemental analysis,thermal analysis,IR and single crystal X-ray diffraction structure analysis. The complex crystallizes in the triclinic P1 space group. The crystallographic data are:a=0.722 4(3) nm,b=1.181 2(4)nm,c=1.353 4(5)nm,V=1.039 47(7)nm3,Z=1,Dc=1.795g·cm-3,R1=0.0558,wR2=0.148 7. In the complex,the cobalt(Ⅱ) mononuclear anion ([Co(SNDC)2(H2O)4]4-) adopts the six-coordinated octahedral geometry furnished by two carboxylate oxygen atoms from the SNDC ligands and four water oxygen atoms. The cobalt(Ⅱ) mononuclear anions are self-assembled into two-dimensional sheets through hydrogen bonding between coordinated water molecules and carboxylate oxygens and π-π stacking of the aromatic naphthalene moieties. The [Co(H2O)6]2+ cations are intercalated between the layers through additional hydrogen bonds involving coordinated water molecules and sulfonate/carboxylate oxygen atoms.
