Bombicz, Petra published the artcileSynthesis, vibrational spectra and X-ray structures of copper(I) thiourea complexes, Safety of Formamidine disulfide dihydrochloride, the publication is Inorganica Chimica Acta (2004), 357(2), 513-525, database is CAplus.
Complex formation of thiourea with Cu takes place as an intermediate step in the preparation of Cu sulfide thin films by spray pyrolysis starting from aqueous solutions of Cu(II) chloride and thiourea. The stoichiometry of the complex and that of the resulting thin film primarily depends on the mol. ratio of the starting materials. For comparison, the structures of all Cu(I) thiourea complexes found in the Cambridge Structural Database are classified. Syntheses, structural (single crystal XRD also at low temperature 193 K) and spectroscopic studies (FTIR and Raman) of six Cu-thiourea complexes are now reported. The Cu to thiourea stoichiometric ratio is 1:3 in four of these complexes, but their structures are basically different as dimerization or polymer formation takes place depending on whether the H2O of crystallization is present or absent. The structure of bis(μ-thiourea)tetrakis(thiourea)dicopper(I) dichloride dihydrate, [Cu2(tu)6]Cl2·2H2O (1) was determined at room and also at low temperature Bis(μ-thiourea)tetrakis(thiourea)dicopper(I) dibromide dihydrate, [Cu2(tu)6]Br2·2H2O (2) is isomorphous with 1, and the anhydrous compounds chlorotris(thiourea)copper(I), [Cu(tu)3]Cl (3) and bromotris(thiourea)copper(I), [Cu(tu)3]Br (4) are isomorphous. In the 3rd isomorphous pair of complexes the Cu to thiourea stoichiometric ratio is 1:1, viz. chloro(thiourea)copper(I) hemihydrate, [Cu(tu)]Cl·0.5H2O (5) and bromo(thiourea)copper(I) hemihydrate, [Cu(tu)]Br·0.5H2O (6). During the preparation of chloro(thiourea)copper(I) hemihydrate (5) a reaction byproduct α,α‘-dithiobisformamidinium dichloride, [SC(NH2)2]2Cl2 (7) was identified and structurally characterized which made it possible to suggest a reaction path leading to complex formation.
Inorganica Chimica Acta published new progress about 14807-75-1. 14807-75-1 belongs to ethers-buliding-blocks, auxiliary class Salt,Thiourea,Amine,Aliphatic hydrocarbon chain, name is Formamidine disulfide dihydrochloride, and the molecular formula is C2H8Cl2N4S2, Safety of Formamidine disulfide dihydrochloride.
Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem