Synthesis and elemental analysis of metallocene analogic complexes (NpCpTiCl 2) containing the azole ligand (Np) are described,in which Np is Pr=Pyrolyl (C 4H 4N)(1); Id=Indolyl (C 8H 6N)(2); Ai=7 Azaindolyl (C 7H 5N ...Synthesis and elemental analysis of metallocene analogic complexes (NpCpTiCl 2) containing the azole ligand (Np) are described,in which Np is Pr=Pyrolyl (C 4H 4N)(1); Id=Indolyl (C 8H 6N)(2); Ai=7 Azaindolyl (C 7H 5N 2)(3); Iz=Indazolyl (C 7H 5N 2)(4); Bi=Benzimidazolyl (C 7H 5N 2)(5),respectively.It is proved by the experiments that NpCpTiCl 2 is active for ethylene polymerization at 30℃ and 0.1?mPa with MAO activation,and the results show that the activity of 1 and 2 which contain one nitrogen in the azole ring is higher than 4 and 5 which contain two nitrogens,while 3 is inactive.For the NpCpTiCl 2/MAO system,the activity is “up and down” type with increase in the Al/Ti molar ratio,and up to the highest when the Al/Ti molar ratio is about 500.The polyethylene obtained is characteristic of narrow distribution with molecular weight M w around 35×10 4 and molecular weight ratio M w/ M n less than 3.展开更多
The crystal structure of tricarbonylpentamethyldisilanylcyclopentadienyl chloro molybdenum complex [Mo(eta5 C5H4Si2Me5)(CO)3Cl] has been determined by X ray diffraction method.A quantum chemistry calculation by means ...The crystal structure of tricarbonylpentamethyldisilanylcyclopentadienyl chloro molybdenum complex [Mo(eta5 C5H4Si2Me5)(CO)3Cl] has been determined by X ray diffraction method.A quantum chemistry calculation by means of G98W package and taking LanL2DZ basis set.The crystal belongs to orthorhombic spacegroup Pbca with a=1.5812(5), b=1.7307(3), c=1.3339(2)nm,V=3.650(1)nm3, Z=8, Dc=1.495 g·cm-3, μ(Mo Kα)= 9.97cm-1,F(000)=1664,final R=0.027 for 2590 unique reflection . The bond lengths of Mo Cl and is 0.250nm,and Mo CO is 0.198～0.202nm. The Mo atom has a distorted tetrahedral cone geometry.展开更多
Titanocene（ CpTiCl3） has been found to be an efficient dopant for the hydrogenation of nanometric magnesium powders. These magnesium powders are generated by the thermal decomposition of magnesium anthracene· 3...Titanocene（ CpTiCl3） has been found to be an efficient dopant for the hydrogenation of nanometric magnesium powders. These magnesium powders are generated by the thermal decomposition of magnesium anthracene· 3THF at 90～ 150℃ under vacuum. They can uptake hydrogen to form magnesium hydride even at 185℃ with a hydrogenation rate much higher than those of the undoped ones under normal pressure. The order of the hydrogenation reaction with respect to the nanometric magnesium surface area is one.展开更多
文摘Synthesis and elemental analysis of metallocene analogic complexes (NpCpTiCl 2) containing the azole ligand (Np) are described,in which Np is Pr=Pyrolyl (C 4H 4N)(1); Id=Indolyl (C 8H 6N)(2); Ai=7 Azaindolyl (C 7H 5N 2)(3); Iz=Indazolyl (C 7H 5N 2)(4); Bi=Benzimidazolyl (C 7H 5N 2)(5),respectively.It is proved by the experiments that NpCpTiCl 2 is active for ethylene polymerization at 30℃ and 0.1?mPa with MAO activation,and the results show that the activity of 1 and 2 which contain one nitrogen in the azole ring is higher than 4 and 5 which contain two nitrogens,while 3 is inactive.For the NpCpTiCl 2/MAO system,the activity is “up and down” type with increase in the Al/Ti molar ratio,and up to the highest when the Al/Ti molar ratio is about 500.The polyethylene obtained is characteristic of narrow distribution with molecular weight M w around 35×10 4 and molecular weight ratio M w/ M n less than 3.
文摘The crystal structure of tricarbonylpentamethyldisilanylcyclopentadienyl chloro molybdenum complex [Mo(eta5 C5H4Si2Me5)(CO)3Cl] has been determined by X ray diffraction method.A quantum chemistry calculation by means of G98W package and taking LanL2DZ basis set.The crystal belongs to orthorhombic spacegroup Pbca with a=1.5812(5), b=1.7307(3), c=1.3339(2)nm,V=3.650(1)nm3, Z=8, Dc=1.495 g·cm-3, μ(Mo Kα)= 9.97cm-1,F(000)=1664,final R=0.027 for 2590 unique reflection . The bond lengths of Mo Cl and is 0.250nm,and Mo CO is 0.198～0.202nm. The Mo atom has a distorted tetrahedral cone geometry.
文摘Titanocene（ CpTiCl3） has been found to be an efficient dopant for the hydrogenation of nanometric magnesium powders. These magnesium powders are generated by the thermal decomposition of magnesium anthracene· 3THF at 90～ 150℃ under vacuum. They can uptake hydrogen to form magnesium hydride even at 185℃ with a hydrogenation rate much higher than those of the undoped ones under normal pressure. The order of the hydrogenation reaction with respect to the nanometric magnesium surface area is one.
