Detail of "4761-93-7"

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Quantum-chemical study of the corrosion inhibition of mild steel in 6% (wt/wt) hydrochloric acid by means of cyanoguanidine derivatives

Quantum-chemical study of the corrosion inhibition of mild steel in 6% (wt/wt) hydrochloric acid by means of cyanoguanidine derivatives. Chakrabarti, A. (Dep. Chem., Panskura Banamali Coll., Midnapore 721 139, India). Br. Corros. J., 19(3), 124-6 (English) 1984. CODEN: BCRJA3. ISSN: 0007-0599. DOCUMENT TYPE: Journal CA Section: 55 (Ferrous Metals and Alloys) Corrosion inhibition efficiencies of biguanide monohydrochloride [4761-93-7], dicyandiamide [461-58-5], guanylurea-o-hydrochloride [41363-32-0], and biuret [108-19-0] were detd. by gravimetry. The energy eigen values, and the p-electron distributions of the compds., obtained using the Hueckel method, are used to aid the choice of inhibitors. The eigen value of the highest occupied mol. orbitals (HOMO), and those of the lowest unoccupied mol. orbitals (LUMO), which correspond to the ionization energies and the electron affinities, resp., bear a single linear relation with the logarithm of inhibition efficiencies. The inhibition efficiency increases with the increase in the HOMO energy, and decreases with the increase in the electron-accepting capacity of the inhibitor. Biguanide monohydrochloride is the most efficient inhibitor among the 4 cyanoguanidine derivs. studied, on account of its high electron-donating capacity.

Biguanide hydrochloride

Biguanide hydrochloride. Ernst, Stephen R. (Dep. Crystallogr., Univ. Pittsburgh, Pittsburgh, Pa., USA). Acta Crystallogr., Sect. B, B33(1), 237-40 (English) 1977. CODEN: ACBCAR. DOCUMENT TYPE: Journal CA Section: 75 (Crystallization and Crystal Structure) Biguanide monohydrochloride is monoclinic, space group P21/n, with a 4.384(1), b 17.549(2), c 8.363(1).ANG., and .beta. 101.76(1).degree.Several substances like 4761-93-7 may be metioned in this study.; d(calcd.) = 1.45 and d.(exptl.) = 1.46 for Z = 4. The final residual calcd. for 1020 obsd. reflections was 0.045. The mol. exists in a tautomeric form with all C-N bond lengths approx. equal. Bond angles and distances were detd. .