By the reaction of bidentate ligand 1,1'-bis(diphenylphosphino)-ferrocene (dppf) with MoCl_4(CH_3CN)_2, a novel bonding type complex (MoCl_4)2_· (dppf) was synthesized and characterized by elemental analyses,...By the reaction of bidentate ligand 1,1'-bis(diphenylphosphino)-ferrocene (dppf) with MoCl_4(CH_3CN)_2, a novel bonding type complex (MoCl_4)2_· (dppf) was synthesized and characterized by elemental analyses, ^(31)p-NMR, IR and electronic spectra, TG and ICP-AES. Structure of the title complex was proposed.展开更多
A binuclear copper（I） complex [Cu2（dppm）2（C7H6N2）2]（NO3）2 （C7H6N2 = benzimidazole, dppm = Ph2PCH2PPh2） has been synthesized and characterized by X-ray crystallography.The crystal belongs to monoclinic, space...A binuclear copper（I） complex [Cu2（dppm）2（C7H6N2）2]（NO3）2 （C7H6N2 = benzimidazole, dppm = Ph2PCH2PPh2） has been synthesized and characterized by X-ray crystallography.The crystal belongs to monoclinic, space group C2/c with a = 14.167（3）, b = 21.209（4）, c =20.680（4）A°, β = 103.93（3）°, C32H28CuN3O3P2, Mr = 628.05, Z = 8, μ = 0.868 mm^-1, V = 6031 （2） ,A°^3,F（000） = 2592, De= 1.383 g/cm^3, R = 0.0593 and wR = 0.1736. A total of 5297 independent reflections were collected, of which 3503 were observed with 1 〉 2σ（/）. The central copper atom is tri-coordinated by phosphorus atoms from bridging dppm and nitrogen atom from benzimidazole. In the coordination sphere, the bond lengths of Cu-P（1） and Cu-P（2） are 2.2607（17） and 2.2503（16） A°,respectively and the P-Cu-P bond angle is 127.26（6）°.展开更多
The present paper reports the synthesis of two analogs of Schzandrin C (-DDB, (-DDB with the gallic acid as the starting material. The key step is the synthesis of monomer of (-DDB and (-DDB for coupling. (-DDB, (-DD...The present paper reports the synthesis of two analogs of Schzandrin C (-DDB, (-DDB with the gallic acid as the starting material. The key step is the synthesis of monomer of (-DDB and (-DDB for coupling. (-DDB, (-DDB have different yields in Ullmann coupling reaction under the same condition. The yield of (-DDB is little lower than that of (-DDB. The AM1 calculation demonstrates that ΔH of the Ullmann coupling reaction of (-DDB and (-DDB are different. The former is -175.76966KJ/mol and the later is -203.21246KJ/mol. This is in agreement with the fact that (-DDB has higher yield than (-DDB.展开更多
In present paper, the 2,3-diaryl-butadiene analogues were synthesized as anti-cancer agents. The structures were confirmed by (HNMR)-H-1 and elemental analysis.
Two new lignans with dibenzocycloheptadiene skelectons have been synthesized by intramolecular nonphenolic oxidative coupling and rearrangement. The structures of these products have been identified by MS, UV, IR and ...Two new lignans with dibenzocycloheptadiene skelectons have been synthesized by intramolecular nonphenolic oxidative coupling and rearrangement. The structures of these products have been identified by MS, UV, IR and NMR spectra.展开更多
The synthesis and molecular structure of a new dinuclear copper（Ⅰ） complex [Cu（dppb）（NO 3）] 2 are reported.The compound crystallizes in the monoclinic system,space group P2 1 /n with a=12.830（3）,b=10.899（2）...The synthesis and molecular structure of a new dinuclear copper（Ⅰ） complex [Cu（dppb）（NO 3）] 2 are reported.The compound crystallizes in the monoclinic system,space group P2 1 /n with a=12.830（3）,b=10.899（2）,c=19.666 （4）,β=104.69（3）°,V=2660.1（9）3,Z=4,D c=1.378 g/cm 3,F（000）=1144,the final R=0.0600 and wR=0.0668 for 2951 observed reflections with I 2σ（Ⅰ）.The complex contains a folded Cu 2 P 4 core structure,with two Cu（Ⅰ） atoms being bridged by a pair of dppb ligands to form a 14-membered Cu 2 P 4 C 8 zigzag ring.The ligand sphere of each metal center is completed by a nitrate anion in a chelating fashion.展开更多
A series of nine Pd(0)complexes(L)Pd(L')[L=bis(diphenylphosphino) methane(dppm),1,2-bis(diphenylphosphino)ethane(dppe),and 1,1'-bis(diphenyl- phosphino)ferrocene(dppf),respectively;L=dibenzylideneacetone(dba),...A series of nine Pd(0)complexes(L)Pd(L')[L=bis(diphenylphosphino) methane(dppm),1,2-bis(diphenylphosphino)ethane(dppe),and 1,1'-bis(diphenyl- phosphino)ferrocene(dppf),respectively;L=dibenzylideneacetone(dba),2,3,5, 6-tetrachloro-1.4-benzoquinone(q)and 2,3-dichloro-1,4-naphthoquinone(nq)] were synthesized and characterized by means of elemental analyses,IR,UV, 1~H-NMR and^(31)P-NMR spectra.The redox wave peak potentials of the ferrocenyl group of complexes with dppf were measured by using CV method.Results showed that all the diphosphorus ligands behaved as chelating bidentate ligand and dba,q,nq were coordinated to the Pd(0)atom through their C=C moieties,not their carbonyl ones.Analytical data also showed that there were interactions between the two different ligands in each complex.展开更多
The commercial hydroxyl group terminated polytetramethylene glycol （PTMG）is prepared by the cationic ring-opening polymerization of tetrahydrofuran （THF）by using a strong protonic acid initiator system such as fum...The commercial hydroxyl group terminated polytetramethylene glycol （PTMG）is prepared by the cationic ring-opening polymerization of tetrahydrofuran （THF）by using a strong protonic acid initiator system such as fuming sulfuric acid and others. There has been considerable interest in the low-corrosive BF<sub>3</sub> initiator system. However, the展开更多
1 Introduction The excited-state standard potential of a chemical species is an essential datum for photochemists to investigate electron-transfer processes involving the electronically excited species (EES). With sem...1 Introduction The excited-state standard potential of a chemical species is an essential datum for photochemists to investigate electron-transfer processes involving the electronically excited species (EES). With semiconductor electrodes, scientists have tried to measure excitedstate potentials (ESP) directly or indirectly, and, as they claimed, obtained展开更多
Three arylamide-bridged biscoumarin derivatives 1-3 have been designed and prepared. Compounds 1 and 2 are induced by the intramolecular N?H…O and N·H…F hydrogen bonding to possess a helical conformation,and 3 ...Three arylamide-bridged biscoumarin derivatives 1-3 have been designed and prepared. Compounds 1 and 2 are induced by the intramolecular N?H…O and N·H…F hydrogen bonding to possess a helical conformation,and 3 is induced to have an extended conformation. A comparison of their absorption and fluorescent spectra in a variety of solvents of a wide range of polarity with those of control compound 4 reveals that,for foldamers 1 and 2,the intramolecular hydrogen bonding and the helical conformations exist in most solvents,but do not exist or are very weak in DMF and DMSO.展开更多
The asymmetric binuclear copper(I) complex [Cu2(dppm)2(C7H7N)(-HCOO)](NO3) (dppm=Ph2PCH2PPh2, C7H7N=4-vinyl-pyridine) has been prepared and characterized by physicochemical and spectroscopic methods. The complex is ph...The asymmetric binuclear copper(I) complex [Cu2(dppm)2(C7H7N)(-HCOO)](NO3) (dppm=Ph2PCH2PPh2, C7H7N=4-vinyl-pyridine) has been prepared and characterized by physicochemical and spectroscopic methods. The complex is photoluminescent at room temperature. It crystallizes in triclinic system, space group P-1 with a=1.2719(3) nm, b=1.8637(4) nm, c=1.1656(2) nm, =97.16(3), =104.94(3), =89.39(3), V=2.648.1(9) nm3, Dc=1.390 gcm-3, Z=2, =0.974 mm-1, R=0.0483 for 5716 independently observed reflections with I>2(I). The structure consists of [Cu2(dppm)2(C7H7N)(-HCOO)]+cations and nitrate anions. The copper atoms show dif-ferent coordination modes: Cu(1) displays a distorted trigonal and Cu(2) a tetrahedred geometry.展开更多
At room temperature, the chain-like polymeric copper (II) complexes bridged by bis (diphenylphosphino oxide) ethane (dppeO2), [Cu(dppeO2)X2]n[XCI(1), Br(2)] have been prepared and characterized by elemental analysis, ...At room temperature, the chain-like polymeric copper (II) complexes bridged by bis (diphenylphosphino oxide) ethane (dppeO2), [Cu(dppeO2)X2]n[XCI(1), Br(2)] have been prepared and characterized by elemental analysis, 31P NMR, TG-DTA and X-ray analysis for [ CuBr2 ( dppeO2) ]n. The chain is composed of submits containing tetrahedron coordinated copper (II) atoms. The four-coordinated copper(II) atom is ligated to another four-coordinated copper(II) atom through dppeO2. The coordination sphere of copper (II) atom is completed by two monodentate bromide and two oxygen atoms from bridging dppeO2. Crystal data are as follows: C26-H24CuP2Br2O2, 0.50 mm × 0.40 mm × 0.40 mm, monoclinic, space group: C2/c, λ = 0.07107 nm(Mo Kα), a= 1.2286(2) nm, b=2.0555(8) nm, c = 1.0652(2) nm, β=97.366(9)°, V = 2.668nm3 Z = 4, Dcalc =1.628 g·cm?3, R=0.066; Rw = 0.091.展开更多
The novel trinuelear copper(I) complex [Cu3(μ3-Br)2(dppm)3]Br has been obtained by reaction of bis(diphenyl-phosphino)methane (dppm) with cupric bromide. The title complex was characterized by single-crystal X-ray an...The novel trinuelear copper(I) complex [Cu3(μ3-Br)2(dppm)3]Br has been obtained by reaction of bis(diphenyl-phosphino)methane (dppm) with cupric bromide. The title complex was characterized by single-crystal X-ray analysis, elemental analysis, molecular weight determination, 31P NMR and its conductivity was also measured. The [Cu3(dppm)3Br2] + cation consists of a triangular array of copper atoms, with dppm ligands (Ph2PCH2PPh2) bridging each edge of the triangle and two triply bridging Br groups bound to the two faces of the Cu3 unit. Crystallographic data: monoclinic, space group P21/c, a = 1.4739(4) , b = 1.7708(5), c = 2.8395(8) nm, β= 97.16(3)°, V = 7.353nm3, Z = 4,F(000)= 3296, Dcalc = 1.472 g/cm3, μ= 26.478 cm-1, R = 0.06, Rw = 0.08, 4654 reflections observed with I > 3σ(I).展开更多
文摘By the reaction of bidentate ligand 1,1'-bis(diphenylphosphino)-ferrocene (dppf) with MoCl_4(CH_3CN)_2, a novel bonding type complex (MoCl_4)2_· (dppf) was synthesized and characterized by elemental analyses, ^(31)p-NMR, IR and electronic spectra, TG and ICP-AES. Structure of the title complex was proposed.
基金This work was supported by the National Natural Science Foundation of China (No. 20271017) and Henan Provincial Innovation Foundation (No. 0421001300)
文摘A binuclear copper（I） complex [Cu2（dppm）2（C7H6N2）2]（NO3）2 （C7H6N2 = benzimidazole, dppm = Ph2PCH2PPh2） has been synthesized and characterized by X-ray crystallography.The crystal belongs to monoclinic, space group C2/c with a = 14.167（3）, b = 21.209（4）, c =20.680（4）A°, β = 103.93（3）°, C32H28CuN3O3P2, Mr = 628.05, Z = 8, μ = 0.868 mm^-1, V = 6031 （2） ,A°^3,F（000） = 2592, De= 1.383 g/cm^3, R = 0.0593 and wR = 0.1736. A total of 5297 independent reflections were collected, of which 3503 were observed with 1 〉 2σ（/）. The central copper atom is tri-coordinated by phosphorus atoms from bridging dppm and nitrogen atom from benzimidazole. In the coordination sphere, the bond lengths of Cu-P（1） and Cu-P（2） are 2.2607（17） and 2.2503（16） A°,respectively and the P-Cu-P bond angle is 127.26（6）°.
基金the Henan Outstanding Younth and Natural Science Foundation of China
文摘The present paper reports the synthesis of two analogs of Schzandrin C (-DDB, (-DDB with the gallic acid as the starting material. The key step is the synthesis of monomer of (-DDB and (-DDB for coupling. (-DDB, (-DDB have different yields in Ullmann coupling reaction under the same condition. The yield of (-DDB is little lower than that of (-DDB. The AM1 calculation demonstrates that ΔH of the Ullmann coupling reaction of (-DDB and (-DDB are different. The former is -175.76966KJ/mol and the later is -203.21246KJ/mol. This is in agreement with the fact that (-DDB has higher yield than (-DDB.
文摘In present paper, the 2,3-diaryl-butadiene analogues were synthesized as anti-cancer agents. The structures were confirmed by (HNMR)-H-1 and elemental analysis.
文摘Two new lignans with dibenzocycloheptadiene skelectons have been synthesized by intramolecular nonphenolic oxidative coupling and rearrangement. The structures of these products have been identified by MS, UV, IR and NMR spectra.
基金Supported by the National Natural Science Foundation of China (20972091)the Natural Science Foundation of Henan Province (0811020600)
文摘The synthesis and molecular structure of a new dinuclear copper（Ⅰ） complex [Cu（dppb）（NO 3）] 2 are reported.The compound crystallizes in the monoclinic system,space group P2 1 /n with a=12.830（3）,b=10.899（2）,c=19.666 （4）,β=104.69（3）°,V=2660.1（9）3,Z=4,D c=1.378 g/cm 3,F（000）=1144,the final R=0.0600 and wR=0.0668 for 2951 observed reflections with I 2σ（Ⅰ）.The complex contains a folded Cu 2 P 4 core structure,with two Cu（Ⅰ） atoms being bridged by a pair of dppb ligands to form a 14-membered Cu 2 P 4 C 8 zigzag ring.The ligand sphere of each metal center is completed by a nitrate anion in a chelating fashion.
文摘A series of nine Pd(0)complexes(L)Pd(L')[L=bis(diphenylphosphino) methane(dppm),1,2-bis(diphenylphosphino)ethane(dppe),and 1,1'-bis(diphenyl- phosphino)ferrocene(dppf),respectively;L=dibenzylideneacetone(dba),2,3,5, 6-tetrachloro-1.4-benzoquinone(q)and 2,3-dichloro-1,4-naphthoquinone(nq)] were synthesized and characterized by means of elemental analyses,IR,UV, 1~H-NMR and^(31)P-NMR spectra.The redox wave peak potentials of the ferrocenyl group of complexes with dppf were measured by using CV method.Results showed that all the diphosphorus ligands behaved as chelating bidentate ligand and dba,q,nq were coordinated to the Pd(0)atom through their C=C moieties,not their carbonyl ones.Analytical data also showed that there were interactions between the two different ligands in each complex.
文摘The commercial hydroxyl group terminated polytetramethylene glycol （PTMG）is prepared by the cationic ring-opening polymerization of tetrahydrofuran （THF）by using a strong protonic acid initiator system such as fuming sulfuric acid and others. There has been considerable interest in the low-corrosive BF<sub>3</sub> initiator system. However, the
文摘1 Introduction The excited-state standard potential of a chemical species is an essential datum for photochemists to investigate electron-transfer processes involving the electronically excited species (EES). With semiconductor electrodes, scientists have tried to measure excitedstate potentials (ESP) directly or indirectly, and, as they claimed, obtained
基金supported by the National Natural Science Foundation of China (20732007,20621062,20672137,20872167)the National Basic Research Program of China (2007CB808001)the Science and Technology Commission of Shanghai Municipality (09XD14-05300)
文摘Three arylamide-bridged biscoumarin derivatives 1-3 have been designed and prepared. Compounds 1 and 2 are induced by the intramolecular N?H…O and N·H…F hydrogen bonding to possess a helical conformation,and 3 is induced to have an extended conformation. A comparison of their absorption and fluorescent spectra in a variety of solvents of a wide range of polarity with those of control compound 4 reveals that,for foldamers 1 and 2,the intramolecular hydrogen bonding and the helical conformations exist in most solvents,but do not exist or are very weak in DMF and DMSO.
基金Project supported by the National Natural Science Foundation of China (No. 20271017) and the Natural Science Foundation of Henan Province.
文摘The asymmetric binuclear copper(I) complex [Cu2(dppm)2(C7H7N)(-HCOO)](NO3) (dppm=Ph2PCH2PPh2, C7H7N=4-vinyl-pyridine) has been prepared and characterized by physicochemical and spectroscopic methods. The complex is photoluminescent at room temperature. It crystallizes in triclinic system, space group P-1 with a=1.2719(3) nm, b=1.8637(4) nm, c=1.1656(2) nm, =97.16(3), =104.94(3), =89.39(3), V=2.648.1(9) nm3, Dc=1.390 gcm-3, Z=2, =0.974 mm-1, R=0.0483 for 5716 independently observed reflections with I>2(I). The structure consists of [Cu2(dppm)2(C7H7N)(-HCOO)]+cations and nitrate anions. The copper atoms show dif-ferent coordination modes: Cu(1) displays a distorted trigonal and Cu(2) a tetrahedred geometry.
基金Project supported by the National Natural Science Foundation of China(No. 29871009), Henan Province Outstanding Youth Science Foundation and Henan Natural Science Foundation.
文摘At room temperature, the chain-like polymeric copper (II) complexes bridged by bis (diphenylphosphino oxide) ethane (dppeO2), [Cu(dppeO2)X2]n[XCI(1), Br(2)] have been prepared and characterized by elemental analysis, 31P NMR, TG-DTA and X-ray analysis for [ CuBr2 ( dppeO2) ]n. The chain is composed of submits containing tetrahedron coordinated copper (II) atoms. The four-coordinated copper(II) atom is ligated to another four-coordinated copper(II) atom through dppeO2. The coordination sphere of copper (II) atom is completed by two monodentate bromide and two oxygen atoms from bridging dppeO2. Crystal data are as follows: C26-H24CuP2Br2O2, 0.50 mm × 0.40 mm × 0.40 mm, monoclinic, space group: C2/c, λ = 0.07107 nm(Mo Kα), a= 1.2286(2) nm, b=2.0555(8) nm, c = 1.0652(2) nm, β=97.366(9)°, V = 2.668nm3 Z = 4, Dcalc =1.628 g·cm?3, R=0.066; Rw = 0.091.
基金Project supported by the National Natural Science Foundation of China (No. 29871009), Nanjing State Key Laboratory of Coordination ChemistryNatural Science Foundation of Henan Province.
文摘The novel trinuelear copper(I) complex [Cu3(μ3-Br)2(dppm)3]Br has been obtained by reaction of bis(diphenyl-phosphino)methane (dppm) with cupric bromide. The title complex was characterized by single-crystal X-ray analysis, elemental analysis, molecular weight determination, 31P NMR and its conductivity was also measured. The [Cu3(dppm)3Br2] + cation consists of a triangular array of copper atoms, with dppm ligands (Ph2PCH2PPh2) bridging each edge of the triangle and two triply bridging Br groups bound to the two faces of the Cu3 unit. Crystallographic data: monoclinic, space group P21/c, a = 1.4739(4) , b = 1.7708(5), c = 2.8395(8) nm, β= 97.16(3)°, V = 7.353nm3, Z = 4,F(000)= 3296, Dcalc = 1.472 g/cm3, μ= 26.478 cm-1, R = 0.06, Rw = 0.08, 4654 reflections observed with I > 3σ(I).
