Two new kinds of supramolecular inclusion compound of β cyclodextrin(host)and chloro cyclopentadi enyl tricarbonyl molybdenum(tungsten)(guest) have been prepared and characterized by using the chemical elemental anal...Two new kinds of supramolecular inclusion compound of β cyclodextrin(host)and chloro cyclopentadi enyl tricarbonyl molybdenum(tungsten)(guest) have been prepared and characterized by using the chemical elemental analyses, infrared spectroscopy, nuclear magnetic resonance,powder X ray diffractometry and thin layer chromatography(TLC). The results show that β CD formed one to one compounds with guest and the cyclopentadienyl group of guest may be included into the hydrophobic cavity of β CD. Differential thermal analyses reveal that after formation of the supramolecular inclusion compounds, thermal stability of the host and guest molecules increased.展开更多
Binuclear transition metal carbonyl clusters serve as the simplest models in understand- ing metal-metal and ligand bonding that are important organometallic chemistry catalysis. Binuclear first row transition metal c...Binuclear transition metal carbonyl clusters serve as the simplest models in understand- ing metal-metal and ligand bonding that are important organometallic chemistry catalysis. Binuclear first row transition metal carbonyl ions are produced via a pulsed laser vaporiza- tion/supersonic expansion cluster ion source in the gas phase. These ions are studied by mass-selected infrared photodissociation spectroscopy in the carbonyl stretching frequency region. Density functional theory calculations have been performed on the geometric struc- tures and vibrational spectra of the carbonyl ions. Their geometric and electronic structures are determined by comparison of the experimental IR spectra with the simulated spectra. The structure and the metM-metal and metal-CO bonding of both saturated and unsaturated homonuclear as well as heteronuclear carbonyl cluster cations and anions are discussed.展开更多
文摘Two new kinds of supramolecular inclusion compound of β cyclodextrin(host)and chloro cyclopentadi enyl tricarbonyl molybdenum(tungsten)(guest) have been prepared and characterized by using the chemical elemental analyses, infrared spectroscopy, nuclear magnetic resonance,powder X ray diffractometry and thin layer chromatography(TLC). The results show that β CD formed one to one compounds with guest and the cyclopentadienyl group of guest may be included into the hydrophobic cavity of β CD. Differential thermal analyses reveal that after formation of the supramolecular inclusion compounds, thermal stability of the host and guest molecules increased.
基金supported by the National Natural Science Foundation of China(No.21688102,No.21573047and No.21273045)
文摘Binuclear transition metal carbonyl clusters serve as the simplest models in understand- ing metal-metal and ligand bonding that are important organometallic chemistry catalysis. Binuclear first row transition metal carbonyl ions are produced via a pulsed laser vaporiza- tion/supersonic expansion cluster ion source in the gas phase. These ions are studied by mass-selected infrared photodissociation spectroscopy in the carbonyl stretching frequency region. Density functional theory calculations have been performed on the geometric struc- tures and vibrational spectra of the carbonyl ions. Their geometric and electronic structures are determined by comparison of the experimental IR spectra with the simulated spectra. The structure and the metM-metal and metal-CO bonding of both saturated and unsaturated homonuclear as well as heteronuclear carbonyl cluster cations and anions are discussed.
