The molar dissolution enthalpy of the reactants and the products of the coordination reaction of Samarium Chloride with Glycine have been measured by isoperibol solution calorimetry, the calorimetric solvent is 2mol. ...The molar dissolution enthalpy of the reactants and the products of the coordination reaction of Samarium Chloride with Glycine have been measured by isoperibol solution calorimetry, the calorimetric solvent is 2mol. L-l HCI solution. The standard molar reaction enthalpy (298. 2K) is -7. 3381kJ· mol - 1. From the results and other auxiliary quantities, the standard molar enthalpy of formation of the new coordination compound has been calculated to be (Sm(Cly)3C13. 3H2O, s, 298. ZK) = - 3631. 74kJ · mol- 1.展开更多
The standard formation enthalpy of the glycine complex with erbium chloride was determined by using an isoperibolic calorimeter with the hydrochloric acid solution(2 mol/L) as a calorimetric solvent according a propos...The standard formation enthalpy of the glycine complex with erbium chloride was determined by using an isoperibolic calorimeter with the hydrochloric acid solution(2 mol/L) as a calorimetric solvent according a proposed thermochemical cycle. The following values were obtained: Δ r H θ m(298.15 K)=-3.331 kJ/mol Δ f H θ m(Er(Gly) 3Cl 3·3H 2O,s,298.15 K)=-3 632.0展开更多
The pink powder of manganese L-threonate was obtained by extracting with alcohol the concentrated solution derived from the reaction between L-threonic acid solution prepared by double decomposition reaction of calciu...The pink powder of manganese L-threonate was obtained by extracting with alcohol the concentrated solution derived from the reaction between L-threonic acid solution prepared by double decomposition reaction of calcium L-threonate with oxalic acid and superfluous manganese oxide at 80℃for c ertain time.The composition of the n ew compound was determined by chemical and elemental analyses and its formu la fits Mn (C 4 H 7 O 5 ) 2 ·H 2 O,the IR spectra indicated that Mn 2+ in the compound coordinates to oxygen atom of the carboxyl group,while th e proton of the carboxyl group is dissociated,i t was assumed that the coordination n umber of Mn 2+ was 4.The results of TG-DTG showed that the compound have fairish stability,the intermediate and final product of the thermal de-composition of the compound are Mn (C 4 H 7 O 5 ) 2 and MnO 2 ,respectively.The constant volume combustion energy of the compound,Δ c E,were determined by a precise rotating-bomb calorimeter at 298.15K,it was(-3384.30±1.21)kJ·mol -1 ,its standard enthalpy of Combustio n,Δ c H m ,and standard enthalpy of formation,Δ f H m ,were calculated.They are(-3383.07±1.21)kJ·mol -1 and(-2571.68±1.63)kJ·mol -1 ,respectively.展开更多
The pale blue powder of copper Lthreonac was obtained by extracting with alcohol in the concentrated solution derived from the reaction between Lthreonate acid solution prepared by double decomposition reaction of...The pale blue powder of copper Lthreonac was obtained by extracting with alcohol in the concentrated solution derived from the reaction between Lthreonate acid solution prepared by double decomposition reaction of calcium Lthreonate with oxalic acid and superfluous copper dihydrocarbonate at 80℃ and 30 min.The composition of the new compound was determined by chemical and elemental analyses and its formula fits Cu(C4H6O5)·05H2O.The IR spectra indicated that Cu2+ in the compound coordinates to oxygen atom of the carboxyl group pentaring and oxygen atom of hydroxy group of ethanol attached to carboxyl group forming,while the proton of the carboxyl group is dissociated.The results of TG-DTG show that the compound has fairish stability,the intermediate and final product of the thermal decomposition of the compound are Cu(C4H6O5) and CuO ,respectively.The constant volume combustion energy of the compound,ΔcE,it is (-16165±072)kJ·mol-1,was determined by a precise rotatingbomb calorimeter at 29815K,and its standard enthalpy of combustion,ΔcHθm,and standard enthalpy of formation,ΔfHθm,were calculated.They are(-161491±072)kJ·mol-1and (-111476±081)kJ·mol-1,respectively.展开更多
文摘The molar dissolution enthalpy of the reactants and the products of the coordination reaction of Samarium Chloride with Glycine have been measured by isoperibol solution calorimetry, the calorimetric solvent is 2mol. L-l HCI solution. The standard molar reaction enthalpy (298. 2K) is -7. 3381kJ· mol - 1. From the results and other auxiliary quantities, the standard molar enthalpy of formation of the new coordination compound has been calculated to be (Sm(Cly)3C13. 3H2O, s, 298. ZK) = - 3631. 74kJ · mol- 1.
文摘The standard formation enthalpy of the glycine complex with erbium chloride was determined by using an isoperibolic calorimeter with the hydrochloric acid solution(2 mol/L) as a calorimetric solvent according a proposed thermochemical cycle. The following values were obtained: Δ r H θ m(298.15 K)=-3.331 kJ/mol Δ f H θ m(Er(Gly) 3Cl 3·3H 2O,s,298.15 K)=-3 632.0
文摘The pink powder of manganese L-threonate was obtained by extracting with alcohol the concentrated solution derived from the reaction between L-threonic acid solution prepared by double decomposition reaction of calcium L-threonate with oxalic acid and superfluous manganese oxide at 80℃for c ertain time.The composition of the n ew compound was determined by chemical and elemental analyses and its formu la fits Mn (C 4 H 7 O 5 ) 2 ·H 2 O,the IR spectra indicated that Mn 2+ in the compound coordinates to oxygen atom of the carboxyl group,while th e proton of the carboxyl group is dissociated,i t was assumed that the coordination n umber of Mn 2+ was 4.The results of TG-DTG showed that the compound have fairish stability,the intermediate and final product of the thermal de-composition of the compound are Mn (C 4 H 7 O 5 ) 2 and MnO 2 ,respectively.The constant volume combustion energy of the compound,Δ c E,were determined by a precise rotating-bomb calorimeter at 298.15K,it was(-3384.30±1.21)kJ·mol -1 ,its standard enthalpy of Combustio n,Δ c H m ,and standard enthalpy of formation,Δ f H m ,were calculated.They are(-3383.07±1.21)kJ·mol -1 and(-2571.68±1.63)kJ·mol -1 ,respectively.
文摘The pale blue powder of copper Lthreonac was obtained by extracting with alcohol in the concentrated solution derived from the reaction between Lthreonate acid solution prepared by double decomposition reaction of calcium Lthreonate with oxalic acid and superfluous copper dihydrocarbonate at 80℃ and 30 min.The composition of the new compound was determined by chemical and elemental analyses and its formula fits Cu(C4H6O5)·05H2O.The IR spectra indicated that Cu2+ in the compound coordinates to oxygen atom of the carboxyl group pentaring and oxygen atom of hydroxy group of ethanol attached to carboxyl group forming,while the proton of the carboxyl group is dissociated.The results of TG-DTG show that the compound has fairish stability,the intermediate and final product of the thermal decomposition of the compound are Cu(C4H6O5) and CuO ,respectively.The constant volume combustion energy of the compound,ΔcE,it is (-16165±072)kJ·mol-1,was determined by a precise rotatingbomb calorimeter at 29815K,and its standard enthalpy of combustion,ΔcHθm,and standard enthalpy of formation,ΔfHθm,were calculated.They are(-161491±072)kJ·mol-1and (-111476±081)kJ·mol-1,respectively.
