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Determination of constant‐volume combustion energy for the complexes of zinc nitrate with three amino acids
Author(s) -
Gao ShengLi,
Chen SanPing,
Hu RongZu
Publication year - 2001
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20010191106
Subject(s) - chemistry , zinc nitrate , zinc , standard enthalpy of formation , combustion , volume (thermodynamics) , standard enthalpy change of formation , analytical chemistry (journal) , inorganic chemistry , nuclear chemistry , organic chemistry , thermodynamics , physics
Five solid complexes of zinc with L ‐α‐methionine, L ‐α‐phenylalanine and L ‐α‐histidine were prepared. The constant‐volume combustion energies of the complexes, Δ E c (coordination), were determined by a precise rotating bomb calorimeter at 298.15 K. They were ‐ 2969.03 ± 0.34, ‐2929.46 ± 1.59, ‐9597.13 ± 6.12, ‐4378.98 ± 3.27 and ‐14047 ± 6.75 kJ/mol, respectively. Their standard enthalpies of combustion, Δ H θ m,c (coordination, s, 298.15 K), and standard enthalpies of formation, Δ H θ m,f (coordination, s, 298.15 K), were calculated. They were ‐2959.73 ± 0.34, ‐2923.88 ± 1.59, ‐9649.18 ± 6.12, ‐4373.40 ± 3.27, ‐14048.53 ± 6.75 kj/mol and ‐1180.94 ± 0.92, ‐1401.26 ± 1.77, ‐2501.69 ± 6.50, ‐1381.47 ± 3.49, ‐1950.19 ± 7.65 kJ/mol, respectively.