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1.
用X射线衍射法测定了标题化合物C_(20)G_(20)O_2S_2的晶体结构。该晶体属单斜晶体,空间群为C_2/C,晶胞参数α=1.1504(2)nm,b=1.1781(2)nm,c=1.4443(3)nm,β=101.14(3)°;V=1.9206(7)nm~3,z=4,D_x=1.233mg/mm~3,F(000)=752.最终偏离因子R=0.0436.化合物中碳氧双键键长为0.1193nm,碳碳双键(C(1)-C(2))键长为0.1338nm,S-C_(sp)~2键键长为0.1762nm。  相似文献   

2.
对α-唑基-α-芳氧烷基频哪酮(芳乙酮)及其醇式衍生物的合成和生物活性进行了研究,合成了33个新型化合物,所有化合物的结构均经核磁共振和元素分析证实;初步的生物活性测试结果表明,该类化合物具有一定的杀菌活性和植物生长调节活性.  相似文献   

3.
3-芳基-4-氨基-1,2,4-均三唑-5-硫酮和2.4-二氯苯氧乙酰异硫氰酸酯在丙酮中于60℃回流,制得10个新的均三唑并[3,4-b]-1,3,4-噻二唑(3a-j)化合物,用元素分析、IR、1HNMR和MS确证了结构,并讨论了反应机制。  相似文献   

4.
报道2,4-Br2C6H3OCH(CN3)CO2Sn(C6H11)2CU3(1)和2-OCH3-4-CH3CH=CHC6H3OCH2CO2Sn(C6H11)2CH3(H2O)(Ⅱ)的晶体结构和分子结构。(Ⅰ)单斜晶系,空间群P21/c,a=13.067(3),b=10.594(3),c=18.157(4),β=106.99(2)°,Z=4,Dc=1.672g/cm3,V=2403.73,μ=43.731cm-1,Mr=622.99,F(000)=1232;(Ⅱ)单斜晶系,空间群P21/n,a=10.409(1),b= 12.570(2),c=20.664(2),β=83.51(1)°,Z=4,Dc=1.281g/cm3,V=2686.4A3,μ=9.761cm-1,Mr=539.28,F(000)=1120.最后的偏离因子,化合物(Ⅰ)R=0.046,Rω=0.046;化合物(Ⅱ)R=0.049,Rω=0.047。晶体结构解析表明,化合物(Ⅰ)和(Ⅱ)中的锡均被配体的3个碳和2个氧原子配位,配位原子呈畸变三角双锥构型;化合物中的环己基均为椅式构象;化合物(Ⅱ)中,配位水分子和另一分子的羰基氧与芳环上的甲基氧?  相似文献   

5.
本文报道了3,4-二羟基苯甲醛缩氨基脲及其Cu(Ⅱ)、Ni(Ⅱ)配合物的合成,化合物的组成、配位状态和可能结构由元素分析和多种光谱确定,还对化合物进行了抑制超氧阴离子自由基的研究.  相似文献   

6.
测定了三元体系La(ClO4)3-OCBAAP-H2O在30℃时的溶解度.结果表明,该体系有一个新固相(不一致溶解化合物)La(OCBAAP)4(ClO4)3·6H2O形成.参考该体系溶度图确定合成条件,合成了系列化合物Ln(OCBAAP)4(ClO4)3·nH2O(Ln=La,n=6;Ln=Pr,Nd,Sm,Gd,Yb,n=2).通过化学分析、元素分析、TG-DTG、IR和密度对化合物进行了表征,计算了La(OCBAAP)4(ClO4)3热分解过程各阶段的表观活化能.  相似文献   

7.
NH4ZnPO4的非水合成与晶体结构   总被引:3,自引:2,他引:3  
从非水体系中制得NH4ZnPO4单晶,并用X线测定了晶体结构;晶体属六方晶系,P63空间群,晶胞参数;a=1.0688(2)nm,c=8706(2)nm,Z=8,Dc=2.751g.cm^-3,结构中的锌和磷均为四面体本位,且严格交替排列,无Zn-O-Zn和P-O-P联结方式。  相似文献   

8.
合成了3个系列芳香类含碳-氧键的化合物,用循环伏安法测定了相关的氧化还原电势,通过热力学循环首次估测了负离子基的碳-氧键的断裂能量(ΔHcleav[C-O]^-)。结果表明:得到1个电子形成负离子基可以活化碳-氧键。这与具有相同结构的正离子基的情况是一致的,但其活化程度略小。相关分析表明:ΔHcleav[C-O]^-vs.(ΔEred[C-O]+ΔpKa[HA]和ΔHcleav[C-O]^+vs.  相似文献   

9.
用电沉积方法从含有CrO。及少量HzSO。的电解液中制备的金属铬镀层,具有极好的反光性能及装饰性能,应用十分广泛.但长期以来,一直采用高CrO。浓度(2509·L-‘以上)、高温度(50”C以上)的工艺,加上该工艺阴极电流效率极低(10%左右)*;环境污染、材料和能源浪费严重.近年来,在改善镇铬工艺方面的研究取得了很大的进展,其中使用各种添加剂的尝试得到了一定的成效,如使用含有卤素化合物的添加剂可提高镀铝的阴极电流效率[2-1使用含稀土化合物的添加剂可以使电解液中CrO。浓度和操作温度大大降低,而阴极电流效率却有所…  相似文献   

10.
通过E-[4-[2-(4-羟基苯基)乙烯基]吡啶与1,n-二溴烷烃亲核取代反应合成了4,4‘-[1,n-亚烷基双[(E)-2-(4-氧基苯)乙烯基]]双吡啶[n=2(Ia),3(Ib),4(Ic),6(Id)]。用元素分析、红外、紫外和质子核磁共振谱鉴定了Ia-Id的结构。将Ia-Id的稀溶液用中压汞灯和低压汞灯交替照射,发现其分子内光环加成反应的存在,并且随着亚烷基碳链的延长,反应速度加快。研究还发现锌离子可以与吡啶环上氮原子发生螯合作用使分子内光环加成反应加快。本文化合物荧光很弱,在较高浓度下有较强分子间激基缔合物荧光。  相似文献   

11.
在RHF(基离子在UHF和ROHF)/6-31G,6-31G~*和6-31 G水平优化得到C_4O_4~(m-)(m=0,1,2,3,4)的平衡几何构型,发现从中性分子(C_4O_4)到负4价离子(C_4O_4~(4-))经历了一个由非芳香性到芳香性再到反芳香性的结构变化过程,它们的相对稳定性为C_4O_4~->C_4O_4~(2-)>C_4O_4>C_4O_4~(3-)>C_4O_4~(4-).  相似文献   

12.
The compound phenol,2-[4(S)-4,5-dihydro-4-phenyl-2-ozazolinyl(1,C15H13NO2) was synthesized with a simple,one step method free of water and air.It was obtained in a moderate yield from the reaction of 2-hydroxybenzonitrile with optically active amino alcohol in chloroben-zene under dry,anaerobic conditions.It belongs to the orthorhombic system,space group P212121 with a = 5.786(5),b = 10.730(5),c = 19.722(5),C15H13NO2,Mr = 239.26,V = 1224.4(12)3,Z = 4 and Dc = 1.298 mg/m3.The final R = 0.0324 for 1627 observed reflections with Ⅰ 2σ(Ⅰ) and Rw = 0.0826 for all data.The structure of compound 1 was determined by X-ray diffraction,NMR and HRMS.  相似文献   

13.
1 INTRODUCTION A great deal of interest in transition metal com- plex assembly has recently been devoted to the development of rational synthetic routes to novel one-, two- and three-dimensional crystal frameworks, due to their potential applications in…  相似文献   

14.
A new cadmium(Ⅱ) compound,{[Cd[μ-(4,4'-dps) ]2(H2O)2]·(4-abs )2(H2O)2}n1(4,4'-dps=4,4'-dipyridylsulfide,4-abs=deprotonated 4-amino benzenesulfonic acid),has been synthesized and structurally characterized.It belongs to the orthorhombic system,space group Pbcn with a=19.950(3),b=10.6381(13),c=18.055(2) A,V=3831.8(8) A3,Z=4,C32H36CdN6O10S4,Mr=905.31,F(000)=1848,μ=0.850 mm-1,Dc=1.569 Mg/m3,the final R=0.0238 and wR=0.0589 for 3080 observed reflections with I > 2σ(I).Complex 1 is a one-dimensional linear chain coordination polymer and the repeat unit is comprised of doubly charged cadmium complex cation,uncoordinated 4-aminobenzene sulfonate anions and water molecules.The cadmium(Ⅱ) ion adopts a six-coordinate distorted octahedral geometry.Complex 1 is stabilized and linked into a three-dimensional layered structure through intermolecular O-H…O and N-H…O hydrogen bonds together with electrostatic force.The cyclic voltammograms and fluorescence spectrum of 1 were also measured.It shows one irreversible redox process and emits a very strong and sharp fluorescent band at about 341 nm.  相似文献   

15.
2-(4-Decarboxydehydroabietyl)-5-p-toyl-[1,3,4]-oxadiazole, C28H34N2O, has been synthesized and characterized by IR, NMR, elemental analysis and single-crystal X-ray diffraction method. The crystal belongs to the orthorhombic system, space group P212121 with a = 6.1351(5), b = 14.8495(19), c = 25.9050(2) A, V = 2360.0(4) A3, Z = 4, Mr = 414.57, Dc = 1.167 Mg/m^3, 2 = 0.71073 A,μ(MoKa) = 0.070 mm^-1, F(000) = 896, the final R = 0.0452 and wR = 0.1076 for 1647 observed reflections with I 〉 2σ(I). There are five rings in the crystal structure of the title compound, but the oxadiazole ring is non-coplanar with the benzene ring D.  相似文献   

16.
The title compound (Z)-ethyl-4-(4-methoxy)benzylidene-2-(3,5-dimethoxyphenyl)- tetrahydrofuran-3,3-dicarboxylate has been synthesized, and its crystal structure was characterized by X-ray single-crystal diffraction. The crystal belongs to triclinic, space group P1-, with a = 8.140(3), b = 11.966(4), c = 13.771(5) α = 67.366(4), β = 85.165(5), γ = 75.806(4)°, V = 1200.1(7) 3, Z = 2, C26H30O8, Mr = 470.50, Dc = 1.302 g/cm3, F(000) = 500, λ(MoKα) = 0.71073 , μ = 0.096 mm–1, R = 0.0659 and wR = 0.1841 for 3080 observed reflections (I > 2σ(I)). As a key intermediate of HIV-1 integrase inhibitor, the synthesis and structure confirmation of the title compound are important for further studies.  相似文献   

17.
1INTRODUCTION N-acyl urea is an important class of compounds because of their various bioactivities,and they can be used as pesticides[1]and pharmaceuticals[2].On the other hand,many natural products bearing N-acylurea functionality also exhibit the inter…  相似文献   

18.
王庆华  翁文  郭国聪 《结构化学》2004,23(8):932-935
用 HgI2 和 4,5-亚乙基二硫杂-1,3-二硫杂-2-硫酮 (C5H4S5)反应,合成一种二核汞配合物[Hg(C5H4S5)I2]2 1。X 射线衍射结果表明,晶体属于单斜晶系,C2/c 空间群,晶胞参数 a =21.6847(1),b = 8.5125(4),c = 15.6699(8),a=112.7850(1)°,V=2666.8(2) ?3。Mr = 1357.54,Z = 4,Dx = 3.381 g/cm3,ì = 16.913 cm–1,F(000) = 2400,R=0.0639,wR=0.1711,S=1.052。配合物 1 具有二聚体结构,2 个汞原子通过 2 个碘原子桥联,形成 1 个 Hg2I2菱形平面,汞原子周围的配位是四面体结构,通过分子间的硫…硫作用和碘…硫作用,形成准二维超分子网络。 S S S H g I I S S S S I I H g S  相似文献   

19.
A novel class of 3,4-dihydroisoquinolines (7a~e) was designed, synthesized and characterized by IR, NMR and ESI-MS. The crystal structure of compound 7a (6,7,8-trime- thoxy-1-(4-methoxy-3-nitrophenyl)-4-(pyridin-4-methyl)-3,4-dihydroisoquinoline, C25H25N3O6, Mr=463.48) was determined by X-ray diffraction analysis. The crystal belongs to the monoclinic system, space group P21/n with a=12.074(5), b=12.896(6), c=15.450(7), β=105.846(5)°, V=2314.4(17) 3, Z=4, Dc=1.330 Mg/m3, μ(MoKα)=0.096 mm-1, F(000)=976, S=0.991, the final R=0.0467 and wR=0.1231 for 4545 unique reflections (Rint=0.0656) with 3117 observed ones. The bioassay showed that compounds 7a~e exhibit moderate antitumor activities in vitro.  相似文献   

20.
采用密度泛函理论研究了过渡金属钒族氧化物阳离子团簇(M2O5)+m=1,2(M=V, Nb, Ta)与C2H4气相反应机理. 反应为(M2O5)m++C2H4→(M2O5)m-1M2O4++C2H4O, 反应物先化合生成C—O键相连的化合物, 经过过渡态后M—O键断裂, 从而发生氧原子转移到碳氢化合物上的反应. 对于V2O5+与C2H4的反应, 存在经顺式和反式两种过渡态结构路径, 从能量上看, 经反式过渡态结构的路径更有利. 计算结果表明, 发生反应时C2H4与钒氧化物阳离子反应大量放热, 而与铌、钽氧化物阳离子反应却放热较少甚至不放热, 这与实验结果一致. 钒、铌、钽氧化物阳离子团簇发生氧转移反应活性不同的原因是金属-氧键的强弱不同所致.  相似文献   

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