摘要
Ten solid complexes of zinc nitrate w ith L-α-leucine(Leu),L-α-valine(Val),L-α-tryptophan(Try)and L-α-threonine(Thr )were prepared in water.The compositions of these complexes are determin ed by chemical analysis and elemental analysis,which are identified as Zn(Leu)(NO 3 ) 2 ·2H 2 O(A),Zn(Leu) 2 (NO 3 ) 2 ·H 2 O(B),Zn(Val)(NO 3 ) 2 ·2H 2 O(C),Zn(Val) 2 (NO 3 ) 2 ·H 2 O(D),Zn(Val) 3 (NO 3 ) 2 ·H 2 O(E),Zn(Try)(NO 3 ) 2 ·2H 2 O(F),Zn(Try) 2 (NO 3 ) 2 ·H 2 O(G),Zn(Thr )(NO 3 ) 2 ·2H 2 O(H),Zn(Thr ) 2 (NO 3 ) 2 ·H 2 O(I)and Zn(Thr ) 3 (NO 3 )·H 2 O(J).The constant-volume combustion en ergies of the complexes,Δ c U(complex),were determined by a precise rotating bomb calorimeter a t 298.15K.Standard enthalpies of combustion,Δ c H m (complex,s,298.15K),and standard enthalpies of formatio n,Δ f H m (complex,s,298.15K)for these complexes were calculated as(4523.22±2.08),(7208.86±4.28),(3442.21±1.85),(5971.21±3.32),(9007.26±4.24),(5802.35±2.14),(10891.58±3.01),(2147.40±1.28),(4120.83±0.99),(6444.68±3.85)kJ·mol -1 and(615.67±2.27),(1863.16±4.60),(1017.34±2.00),(1742.93±3.61),(2245.70±4.73),(1161.18±2.61),(1829.71±4.20),(1632.82±1.43),(1885.55±1.50),(2770.25±4.21)kJ·mol -1 ,respectively.
Ten solid complexes of zinc nitrate with L-alpha-leucine(Leu), L-alpha-valine(Val), L-alpha-tryptophan(Try) and L-alpha-threonine(Thr) were prepared in water. The compositions of these complexes are determined by chemical analysis and elemental analysis, which are identified as Zn (Leu) (NO3)(2) . 2H(2)O (A), Zn (Leu)(2)(NO3)(2) . H2O (B), Zn (Val) (NO3)(2) . 2H(2)O (C), Zn (Val)(2)(NO3)(2) . H2O(D), Zn(Val)(3) (NO3)(2) . H2O(E), Zn (Try) (NO3)(2) . 2H(2)O (F), Zn (Try)(2) (NO3)(2) . H2O (G), Zn (Thr) (NO3)(2). 2H(2)O(H), Zn(Thr)(2)(NO3)(2) . H2O (I) and Zn (Thr)(3)(NO3) . H2O(J). The constant-volume combustion energies of the complexes, Delta(c)U(complex), were determined by a precise rotating bomb calorimeter at 298.15K. Standard enthalpies of combustion, Delta(c)H(m)(circle minus) (complex, s, 298.15K), and standard enthalpies of formation, Delta(f)H(m)(circle minus) (complex, s, 298. 15K) for these complexes were calculated as (4523.22 +/- 2.08), (7208.86 +/- 4.28), (3442.21 +/- 1.85), (5971.21 +/- 3.32), (9007.26 +/- 4.24), (5802. 35 +/- 2. 14), (10891. 58 +/- 3. 01), (2147. 40 +/- 1. 28), (4120. 83 +/- 0. 99), (6444. 68 +/- 3. 85) kJ (.) mol (-1) and (615. 67 +/- 2. 27), (1863. 16 +/- 4. 60), (1017. 34 +/- 2. 00), (1742.93 +/- 3.61), (2245.70 +/- 4.73), (1161. 18 +/- 2. 61), (1829. 71 +/- 4. 20), (1632. 82 +/- 1. 43), (1885. 55 +/- 1. 50), (2770. 25 +/- 4. 21) kJ (.) mol (-1), respectively.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2003年第3期278-282,共5页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金资助项目(No.29871032
20171036)。
关键词
硝酸锌
Α-氨基酸
配合物
标准生成焓
zinc nitrate
alpha-amino acid
complex
standard enthalpy of formation