The title compound (C22H18N2O3) has been synthesized by the reaction of 3,4- dimethoxybenzaldehyde, malononitrile and 1-naphthol in ethanol in the presence of piperidine, and its structure was characterized by element...The title compound (C22H18N2O3) has been synthesized by the reaction of 3,4- dimethoxybenzaldehyde, malononitrile and 1-naphthol in ethanol in the presence of piperidine, and its structure was characterized by elemental analysis, IR, 1H NMR and X-ray single-crystal diffraction. The crystal belongs to monoclinic, space group C2/c with a = 24.221(6), b = 9.016(2), c = 17.003(5) ? b = 93.16(1), V = 3707(2) ?, Mr = 358.38, Z = 8, Dc = 1.284 g/cm3, m(MoKa) = 0.087 mm-1, F(000) = 1504, the final R = 0.0432 and wR = 0.1085. X-ray analysis reveals that the atoms of C(1), C(2), C(3), C(4), C(5) and O(1) form a boat-form six-membered ring in which the C(1)C(2) (1.349(3) ? is a C=C double bond.展开更多
The complex of Zn(AcO)22H2O and threonine was prepared in the mixture solvent of water-acetone, the com-position of which was identified as Zn(Thr)(AcO)22H2O by chemical and elemental analyses. The complex was investi...The complex of Zn(AcO)22H2O and threonine was prepared in the mixture solvent of water-acetone, the com-position of which was identified as Zn(Thr)(AcO)22H2O by chemical and elemental analyses. The complex was investigated by XRD, IR, TG-DTG and DSC methods. The result of TG-DTG shows that the thermal decomposi-tion processes of the complex can be divided into three stages, which were dehydration (I), partial decomposition (II) and complete decomposition into ZnO (III). Dehydration enthalpy was 126.89 kJmol-1, decomposition enthalpy of the stage (II) was 79.50 kJmol-1. The study of non-isothermal kinetics shows that the mechanism of the dehydra-tion stage was Maple Power of n=3/2, the apparent activation energy E was 145.32 kJmol-1 and the pre-exponential factor A was 1.4125×1017 s-1, and that of ligand-losting process was nucleation and growth mechanism (Avrami-Erofeev equation n=1/2), its E was 189.33 kJmol-1, and A was 3.4674×1018 s-1. The empirical kinetics model equations of the investigated processes were proposed.展开更多
文摘The title compound (C22H18N2O3) has been synthesized by the reaction of 3,4- dimethoxybenzaldehyde, malononitrile and 1-naphthol in ethanol in the presence of piperidine, and its structure was characterized by elemental analysis, IR, 1H NMR and X-ray single-crystal diffraction. The crystal belongs to monoclinic, space group C2/c with a = 24.221(6), b = 9.016(2), c = 17.003(5) ? b = 93.16(1), V = 3707(2) ?, Mr = 358.38, Z = 8, Dc = 1.284 g/cm3, m(MoKa) = 0.087 mm-1, F(000) = 1504, the final R = 0.0432 and wR = 0.1085. X-ray analysis reveals that the atoms of C(1), C(2), C(3), C(4), C(5) and O(1) form a boat-form six-membered ring in which the C(1)C(2) (1.349(3) ? is a C=C double bond.
基金Project supported by the National Natural Science Foundation of China (Nos. 29871023 and 20171036).
文摘The complex of Zn(AcO)22H2O and threonine was prepared in the mixture solvent of water-acetone, the com-position of which was identified as Zn(Thr)(AcO)22H2O by chemical and elemental analyses. The complex was investigated by XRD, IR, TG-DTG and DSC methods. The result of TG-DTG shows that the thermal decomposi-tion processes of the complex can be divided into three stages, which were dehydration (I), partial decomposition (II) and complete decomposition into ZnO (III). Dehydration enthalpy was 126.89 kJmol-1, decomposition enthalpy of the stage (II) was 79.50 kJmol-1. The study of non-isothermal kinetics shows that the mechanism of the dehydra-tion stage was Maple Power of n=3/2, the apparent activation energy E was 145.32 kJmol-1 and the pre-exponential factor A was 1.4125×1017 s-1, and that of ligand-losting process was nucleation and growth mechanism (Avrami-Erofeev equation n=1/2), its E was 189.33 kJmol-1, and A was 3.4674×1018 s-1. The empirical kinetics model equations of the investigated processes were proposed.
