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The solid complexes of Cr(AA) 2Cl 3·nH 2O of CrCl 3 with L-α-amino acids (AA=Val, Leu, Thr, Met, Arg, Phe, Try and His) have been prepared in 95% EtOH medium, and characterized structurally by elemental analysis, chemical analysis, IR spectra and TG-DTG. The constant-volume combustion energies of the complexes have been determined by RBC-II type rotating-bomb calorimeter. The standard enthalpies of formation of the complexes have been calculated as well, which are ( -2543.16± 3.71) (Val), ( -2561.32± 4.06) (Leu), ( -2284.02± 2.95) (Thr), ( -1418.77± 4.60) (Met), ( -3218.91± 4.67) (Arg), ( -2643.90± 5.02) (Phe), ( -1707.18± 3.23) (Try) and ( -2838.05±3.45) (His) kJ/ mol, respectively.
The solid complexes of Cr (AA) 2Cl 3 · nH 2O of CrCl 3 with L-α-amino acids (AA = Val, Leu, Thr, Met, Arg, Phe, Try and His) have been prepared in 95% EtOH medium , and characterized structurally by elemental analysis, chemical analysis, IR spectra and TG-DTG. The constant-volume combustion energies of the complexes have been determined by RBC-II type rotating-bomb calorimeter. The standard enthalpies of formation of the complexes have been (-2543.16 ± 3.71) (Val), (-2561.32 ± 4.06) (Leu), (-2284.02 ± 2.95) (Thr), (-1418.77 ± 4.60) (Met), (-3218.91 ± 4.67) (Arg), (-2643.90 ± 5.02) (Phe), (-1707.18 ± 3.23) (Try) and (-2838.05 ± 3.45) (His) kJ / mol, respectively.