Foss, Olav published the artcileConstitution of the formamidinium disulfide ion, from the crystal structures of the diiodide and dibromide, Name: Formamidine disulfide dihydrochloride, the publication is Acta Chemica Scandinavica (1958), 1782-98, database is CAplus.
cf. C.A. 52, 8673c. Two-dimensional x-ray analysis shows that the unit cells of [(H2N)2CS]2I2.H2O (I), [(H2N)2CS]2Br2.H2O (II), and [(H2N)2CS]2Cl2.H2O have the dimensions a 5.15 A., b 16.52, c 13.39, d. 2.04 g./cc., and space group D102h-Pccn with Z = 4; a 8.61 A., b 5.12, c 12.40, β 99.5°, d. 2.47 g./cc., and space group C42h-P2/c with Z = 2; and a 10.54 A., b 19.75, c 8.85, d. 1.57 g./cc., space group D152h-Pbca with Z = 8, resp. The disulfide group has a normal configuration and dimensions, with SS 2.04 A. and the SSC angles 99° and 104°, and the CSS/SSC dihedral angles 105° and 89°, resp., for I and II. Except for a slight lengthening of the CS bond, the dimensions of the thiourea (III) group are as in the III mol. before oxidation; there is an insignificant deviation from planarity of the III group and no significant difference between the lengths of the 2 CN bonds of a group. In both salts the H2O mols. lie on 2-fold axes, and each participates in H bonds with 2 halide ions and 2 N atoms. The x-ray crystallographic work establishes the disulfide nature of the salts in the crystalline state. The structures were solved by use of the heavy-atom method; the positions of the I– and Br– ions were determined from Patterson projections.
Acta Chemica Scandinavica 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, Name: Formamidine disulfide dihydrochloride.
Referemce:
https://en.wikipedia.org/wiki/Ether,
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