The title compound （-）-N-[（3R）-3-cyclohexyl]-3-phenylpropananoyl]bornane-10,2sultam （C 25 H 35 NO 3 S,M r=429.60）,a derivative of camphorsultam,crystallizes in the monoclinic space group P2 1 /c with a=10.3301（...The title compound （-）-N-[（3R）-3-cyclohexyl]-3-phenylpropananoyl]bornane-10,2sultam （C 25 H 35 NO 3 S,M r=429.60）,a derivative of camphorsultam,crystallizes in the monoclinic space group P2 1 /c with a=10.3301（7）,b=19.4040（13）,c=11.8106（8）,β=100.5580（10）°,V=2327.3（3） 3,Z=4,D c=1.226 g/cm 3,λ=0.71073,μ（MoKα）=0.165 mm-1 and F（000）=928.X-ray diffraction analysis reveals that the six-membered ring of sultam shows a boat form （Fig.1）.The planes constructed by （C（4）,C（5）,C（6）,C（7）） and （C（7）,C（8）,C（9）,C（4）） form a dihedral angle of 69.5°.The C（1）-C（2）-C（3） plane forms dihedral angles to the aforementioned planes of 89.8（1） and 85.9（3）°,respectively.And molecules are linked via hydrogen bonding （C-H···N/O） interactions.展开更多
The crystal structure and mechanism of the title molecule are discribed. Thiscrystal is orthorhombic, belonging to space group PC21/B with α=1. 002 1 (2) nm, b=1. 483 0(3) nm, c=2. 173 6(4) nm, V=3. 230 39(2) nm3, Z=...The crystal structure and mechanism of the title molecule are discribed. Thiscrystal is orthorhombic, belonging to space group PC21/B with α=1. 002 1 (2) nm, b=1. 483 0(3) nm, c=2. 173 6(4) nm, V=3. 230 39(2) nm3, Z=2, Dc=1.80 g/cm3, R=0. 069 3. The structure was solved by direct method. The tin atom of the title compoundexists in two distorted-trigonal-bipyramidal geometry, defined by two carbon, one bromide,one chloride and one oxygen atoms leading to a five-membered chelate ring. In the structure,the five-membered ring containing the intermolecular O→Sn has a half chair conformation.展开更多
Nanosized rare earth solid superacid SO42/TiO2-Nd2O3 was prepared and was used as a catalyst for cyclohexand dehydration to form cyclohexene.The influence of various preparation parameters such as the concentration of...Nanosized rare earth solid superacid SO42/TiO2-Nd2O3 was prepared and was used as a catalyst for cyclohexand dehydration to form cyclohexene.The influence of various preparation parameters such as the concentration of Nd3+,the concentration of H2SO4 and the calcination temperature on the catalytic activity was studied.It indicates that SO42-/TiO2-Nd2O3 has fairly high catalytic activity on the dehydration of cyclohexand and the yield of cyclohexene can reach 79.73%.The SO42-/TiO2-Nd2O3 catalytic mechanism for cyclohexand dehydration and the Nd3+ effect on the catalytic activity was also disccused.展开更多
基金sponsored by the Science Foundation of Ministry of Education for the New Teacher at the University of China (No. 20070511006)the Research Initiation Funds of Huazhong Agricultural University (No. 52204-09057)
文摘The title compound （-）-N-[（3R）-3-cyclohexyl]-3-phenylpropananoyl]bornane-10,2sultam （C 25 H 35 NO 3 S,M r=429.60）,a derivative of camphorsultam,crystallizes in the monoclinic space group P2 1 /c with a=10.3301（7）,b=19.4040（13）,c=11.8106（8）,β=100.5580（10）°,V=2327.3（3） 3,Z=4,D c=1.226 g/cm 3,λ=0.71073,μ（MoKα）=0.165 mm-1 and F（000）=928.X-ray diffraction analysis reveals that the six-membered ring of sultam shows a boat form （Fig.1）.The planes constructed by （C（4）,C（5）,C（6）,C（7）） and （C（7）,C（8）,C（9）,C（4）） form a dihedral angle of 69.5°.The C（1）-C（2）-C（3） plane forms dihedral angles to the aforementioned planes of 89.8（1） and 85.9（3）°,respectively.And molecules are linked via hydrogen bonding （C-H···N/O） interactions.
文摘以钛酸四丁酯为原料,十六烷基三甲基溴化铵(CTAB)作模板剂,通过水热法制备出介孔TiO2。将TiO2与H2WO4混合,用1 mol/L H2SO4浸渍制得SO42-/TiO2-WO3固体超强酸。以催化环己醇脱水制备环己烯为探针反应,采用IR、XRD对催化剂进行表征。结果表明,在优化条件下,即反应温度为170~180℃,w(催化剂)=5.3%,反应时间为45 m in,环己烯收率可达95.6%。催化剂重复使用5次后收率仍可达88.9%。使用5次后的催化剂经再生后,环己烯收率可达95.3%。水热法制备的催化剂比普通方法制备的催化剂烯收率提高5.65%。
文摘The crystal structure and mechanism of the title molecule are discribed. Thiscrystal is orthorhombic, belonging to space group PC21/B with α=1. 002 1 (2) nm, b=1. 483 0(3) nm, c=2. 173 6(4) nm, V=3. 230 39(2) nm3, Z=2, Dc=1.80 g/cm3, R=0. 069 3. The structure was solved by direct method. The tin atom of the title compoundexists in two distorted-trigonal-bipyramidal geometry, defined by two carbon, one bromide,one chloride and one oxygen atoms leading to a five-membered chelate ring. In the structure,the five-membered ring containing the intermolecular O→Sn has a half chair conformation.
文摘Nanosized rare earth solid superacid SO42/TiO2-Nd2O3 was prepared and was used as a catalyst for cyclohexand dehydration to form cyclohexene.The influence of various preparation parameters such as the concentration of Nd3+,the concentration of H2SO4 and the calcination temperature on the catalytic activity was studied.It indicates that SO42-/TiO2-Nd2O3 has fairly high catalytic activity on the dehydration of cyclohexand and the yield of cyclohexene can reach 79.73%.The SO42-/TiO2-Nd2O3 catalytic mechanism for cyclohexand dehydration and the Nd3+ effect on the catalytic activity was also disccused.
