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A new metal–organic compound [Zn1(deta)(btec)(H2O)2]n where (deta= Diethylenetriamine) and (btec= benzenetetracarboxylic acid) (I) was hydrothermally synthesized from an aqueous solution of Zn(NO3)2 6H2O, (deta) and (btec). Compound I crystallizes in the monoclinic system with the P 21/c space group. The unit cell parameters are a= 9.6716(5)A, b= 14.3776(8)A, c= 13.5306(8)A, β= 105.311(3)°, Z= 4, V= 1814.71(18) A3 and D x= 1.657 g/cm3. The refinement converged into R = 0.045, Rw = 0.048. The structure, determined by single crystal X-ray diffraction, consists of a network of ZnO4 centers, tetrahedrally coordinated by pyromellitate anions giving rise to a two-dimensional sheet structure. The connectivity resembles a 4-connected network in which each Zn atom is connected to four btec anions and each btec anion is linked to four Zn2+ ions.

Hydrothermal synthesis and crystal structure of a new coordination polymer: [Zn1(deta)(btec)(H2O)2]n