The new chelate complex formulated [Cu(NC2H6SO3)(phen)(CH3CO2)]·2H2O (phen is o phenanthroline) has been synthesized and the crystal structure was determined by X ray diffraction. The crystal structure of the <...The new chelate complex formulated [Cu(NC2H6SO3)(phen)(CH3CO2)]·2H2O (phen is o phenanthroline) has been synthesized and the crystal structure was determined by X ray diffraction. The crystal structure of the <IMG SRC="IMAGE/06170007.JPG" HEIGHT=11 WIDTH=12>complex belongs to triclinic system with space group and unite cell parameters: a=7.298(1)?, b=11.573(2)?, c=11.942(3)?;α=69.77(1)°, β=80.05(1)°, γ=76.39(1)°, V=915.2(3)?3, Z=2, F(000)=478. Dc=1.680g·cm-3, μ=1.354mm-1, S=1.045. In the crystal structure Cu?ion is five coordinated to form a distorted tragonal cone. CCDC: 193112.展开更多
Synthesis and characterization of the ligand, 10-(-hexadecylcarboxymethyl)-1,4,7,10-tetraazacyclododecane- 1,4,7-triacetic acid (H4L), and its Gd(III) chelate are described. Protonation constants for H4L (HlgiK=10.52,...Synthesis and characterization of the ligand, 10-(-hexadecylcarboxymethyl)-1,4,7,10-tetraazacyclododecane- 1,4,7-triacetic acid (H4L), and its Gd(III) chelate are described. Protonation constants for H4L (HlgiK=10.52, 9.45, 4.74, 4.10) and the stability constant for GdL- (-GdLlg K=24.50) were determined by potentiometric titrations. The results obtained show that the ligand still maintains the strong chelating properties of the parent DOTA (1,4,7,10-tetraazacyclododecane-N,N',N''N'''-tetraacetic acid) after introduction of a linear chain hexadecyl group at the acetic side chain of DOTA, and its basicity is not significantly altered.展开更多
A series of lithium and aluminum complexes bearing [OC(But)CHP(Ph2)=NBut]-ligand were synthesized and characterized. Reaction of ButC(O)CH2Br with Ph2PNHBut afforded [Ph2P(NHBut)CH2C(O)But]+Br-(1). Treatment of 1 with...A series of lithium and aluminum complexes bearing [OC(But)CHP(Ph2)=NBut]-ligand were synthesized and characterized. Reaction of ButC(O)CH2Br with Ph2PNHBut afforded [Ph2P(NHBut)CH2C(O)But]+Br-(1). Treatment of 1 with excess of NaH in THF generated ligand precursor Ph2P(CH2C(O)But)=NBut (2). Reaction of 2 with AlR3 (R = Me,Et) gave N,O-chelate aluminum complexes [R2Al{OC(But)CHP(Ph2)=NBut}] (3,R = Me; 4,R = Et). Lithiation of 2 with an equiv. of LiBun formed lithium complex [Li{OC(But)CHP(Ph2)=NBut}] (5). Reaction of the lithium complex with an equiv. of AlCl3 yielded [Cl2Al{OC(But) CHP(Ph2)=NBut}] (6). Complex 6 was also obtained by reaction of 3 with an equiv. of AlCl3. Compounds 2-6 were characterized by NMR spectroscopy,elemental analysis and single crystal X-ray diffraction techniques (for 2,3 and 6). Catalysis of complexes 3 and 4 as well as [Me2Al{1-{OC(Ph)CH}-3-R1-5-MeC3HN2}] (R1 = Me,But) toward the ring-opening polymerization of ε-caprolactone was investigated.展开更多
文摘The new chelate complex formulated [Cu(NC2H6SO3)(phen)(CH3CO2)]·2H2O (phen is o phenanthroline) has been synthesized and the crystal structure was determined by X ray diffraction. The crystal structure of the <IMG SRC="IMAGE/06170007.JPG" HEIGHT=11 WIDTH=12>complex belongs to triclinic system with space group and unite cell parameters: a=7.298(1)?, b=11.573(2)?, c=11.942(3)?;α=69.77(1)°, β=80.05(1)°, γ=76.39(1)°, V=915.2(3)?3, Z=2, F(000)=478. Dc=1.680g·cm-3, μ=1.354mm-1, S=1.045. In the crystal structure Cu?ion is five coordinated to form a distorted tragonal cone. CCDC: 193112.
基金Project supported by the Department of Science and Technology of Hunan Province (No. OOSSY 1013-51).
文摘Synthesis and characterization of the ligand, 10-(-hexadecylcarboxymethyl)-1,4,7,10-tetraazacyclododecane- 1,4,7-triacetic acid (H4L), and its Gd(III) chelate are described. Protonation constants for H4L (HlgiK=10.52, 9.45, 4.74, 4.10) and the stability constant for GdL- (-GdLlg K=24.50) were determined by potentiometric titrations. The results obtained show that the ligand still maintains the strong chelating properties of the parent DOTA (1,4,7,10-tetraazacyclododecane-N,N',N''N'''-tetraacetic acid) after introduction of a linear chain hexadecyl group at the acetic side chain of DOTA, and its basicity is not significantly altered.
基金supported by the National Natural Science Foundation of China (20572106)the Foundation for Talents of Anhui Province (2008Z011)
文摘A series of lithium and aluminum complexes bearing [OC(But)CHP(Ph2)=NBut]-ligand were synthesized and characterized. Reaction of ButC(O)CH2Br with Ph2PNHBut afforded [Ph2P(NHBut)CH2C(O)But]+Br-(1). Treatment of 1 with excess of NaH in THF generated ligand precursor Ph2P(CH2C(O)But)=NBut (2). Reaction of 2 with AlR3 (R = Me,Et) gave N,O-chelate aluminum complexes [R2Al{OC(But)CHP(Ph2)=NBut}] (3,R = Me; 4,R = Et). Lithiation of 2 with an equiv. of LiBun formed lithium complex [Li{OC(But)CHP(Ph2)=NBut}] (5). Reaction of the lithium complex with an equiv. of AlCl3 yielded [Cl2Al{OC(But) CHP(Ph2)=NBut}] (6). Complex 6 was also obtained by reaction of 3 with an equiv. of AlCl3. Compounds 2-6 were characterized by NMR spectroscopy,elemental analysis and single crystal X-ray diffraction techniques (for 2,3 and 6). Catalysis of complexes 3 and 4 as well as [Me2Al{1-{OC(Ph)CH}-3-R1-5-MeC3HN2}] (R1 = Me,But) toward the ring-opening polymerization of ε-caprolactone was investigated.
