Synthesis and Characterization of Coordination Compounds of Silver(I) Nitrite with Ligands Ethylenethiourea and N,N'-diethylthiourea

Fariati Fariati (Universitas Negeri Malang)
Nurul Istikfaroh (State University of Malang)
Effendy Effendy (State University of Malang)
Lutfia Ayu Darojah (State University of Malang)

The Journal of Pure and Applied Chemistry Research
Vol 5, No 3 (2016)

Silver(I) nitrate and ethylenethiourea (etu) in 1 : 4 stochiometry have been reported [1]. Coordination compounds of A and B as silver(I) nitrite with etu and silver(I) nitrite with N,N’-diethylthiourea (detu) respectively, have never been done. The purposes of this study are to synthesize and characterize coordination compounds of A and B. Synthesis coordination compound of A with 1 : 4, while B with 1 : 2 stoichiometry. Both of coordination compounds are conducted directly in acetonitrile. Compounds obtained are characterized by melting point, electrical conductivity measurement, SEM-EDX, qualitative nitrite test, free energy calculation and structures prediction using Spartan’14 v1.1.0. Coordination compounds of A and B are colourless needle and prism crystals; have melting point of 189°C and 103-105°C; free energy of -289,2567 and -1182.8101 kJ/mol respectively. Electrical conductivity measurement and qualitative nitrite test show that the obtained compound of A is an ionic and B is a molecular one. EDX analysis gives empirical formula prediction of two coordination compound A is C12H24AgN9O2S4  and  B is C15H36AgN7O2S3.