共查询到18条相似文献,搜索用时 93 毫秒
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以TG-DTG为手段,研究了双酚S-二(5,5-二甲基-1,3-二氧杂己内磷酸酯)(FR)在氮气气氛中的热分解动力学,利用Kissinger和Flynn-Wall-Ozawa(FWO)法对FR进行热分解动力学分析,求出了该物质的热分解动力学参数.结果表明,Kissinger法所求得的活化能为190.16 kJ.mol-1,指前因子lgAk为17.42 s-1;FWO法所求得的活化能为198.48 kJ.mol-1.Coats-Redfern方法得到其热分解动力学方程为g(α)=(1-α)-2. 相似文献
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本实验采用季戊四醇与苯三甲醛缩合, 制成树状化合物1,3,5-三{3-|[2,4,8,10-四氧杂-9(3,5-二(2,6-二氧杂-4,4-二羟甲基环己基)苯基)螺[5.5]十一烷基}苯. 该类树状分子具有手性螺环结构, 手性密度很高, 可开发成理想的高效手性催化剂[3~8], 具有诱人的应用前景. 相似文献
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报道了用3-甲酰基色酮、5,5-二甲基-1,3-环己二酮、乙酰乙酸乙酯与醋酸铵一步法合成4-(色酮-3-基)-3-乙氧羰基-1,4,5,6,7,8-六氢-5-氧代-2,7,7-三甲基喹啉类化合物, 对其结构进行了表征, 并分析了代表性化合物2f的晶体结构. 2f晶体属于单斜晶系, P2/c空间群, 所得晶胞参数为: a=2.0255(4) nm, b=0.9132(2) nm, c=1.4066(3) nm, β=121.60(3)°, V=2.2159(8) nm3, Z=4, Dc=1.335 g/cm3, μ=0.209 mm-1, F(000)=736, R1=0.0556, wR2=0.1248. 相似文献
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果蝇 ( Tephritidae)对水果生产有严重的危害 .热带果蝇寿命较长 ,具有很强的迁徙能力和繁殖能力 .因此开展果蝇生物防治和控制措施的相关研究具有重要的意义 [1,2 ] .Baker等 [3]发现性成熟的雌B.dorsalis果蝇 ,性腺分泌物中包含有螺环缩酮化合物 2 ,8-二甲基 - 1 ,7-二氧杂螺 [5 ,5 ]十一烷 ( 1 ) .Bactrocera Latifrons( Hendel)果蝇的雄性腺体分泌物中也存在螺环缩酮 1 [4 ] ,另外在 rove甲虫腹梢分泌物中也分离出 1 [5] ,螺环缩酮不仅作为性信息素组分存在于许多果蝇腺体中 ,而且作为结构单元存在于许多复杂的有强烈生理活性的天然… 相似文献
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二代螺环树形化合物1,2,3,4,5,6,7,8,9,10,11,12-十二氢-2,2;6,6;10,10-三[3,3-二(烷氧羰基)-1,1-环亚丁基二甲氧基]三亚苯基的合成 总被引:1,自引:0,他引:1
以1,4-环己二酮、丙二酸二乙酯及多元醇等为原料, 经过两次“一锅煮”法合成了六种二代螺环树形化合物1,2,3,4,5,6,7,8,9,10,11,12-十二氢-2,2;6,6;10,10-三[3,3-二(烷氧羰基)-1,1-环亚丁基二甲氧基]三亚苯基螺环树形化合物, 其中烷氧基为异戊氧基、三羟甲基甲氧基、2,2-二溴甲基-3-羟丙氧基、2,2-二羟甲基丙氧基、二羟甲基膦甲氧基和(N-羟甲基-N-二羟甲基氨基乙基)甲氧基. 利用IR, NMR, MS和元素分析对合成的化合物进行了结构认证, 对影响反应的因素进行了讨论. 相似文献
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The title compound, 1,4-dimethyl-2,5-di{[2’-(3-pyridylmethylaminoformyl)phenoxyl]- methyl}benzene perchlorate (C36H36Cl2N4O12, Mr = 787.59), has been synthesized and structurally determined by single-crystal X-ray diffraction. The crystal crystallizes in the orthorhombic system, space group Pbca with a = 14.366(4), b = 15.159(4), c = 16.443(5), V = 3580.9(17)3, Z = 4, Dc = 1.461 g/cm3, μ = 0.253 mm-1, F(000) = 1640, R = 0.0618 and wR = 0.1525 for 1615 observed reflections (I > 2σ(I)). In the structure of the title compound, a two-dimensional supramolecular layer is formed via intermolecular hydrogen bonding interactions. 相似文献
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Irina O. Zhuravel Oleg V. Zaremba Oleksandr S. Detistov Svitlana S. Kovalenko Valentin P. Chernykh 《合成通讯》2013,43(21):3778-3784
New 5-hydroxymethyl-8-methyl-3-(3-aryl-[1,2,4]oxadiazol-5-yl)-2H-pyrano-[2,3-c]pyridin-2-ones and their esters were synthesized. The structure of obtained compounds was determined through a complete 1H NMR analysis. 相似文献
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TANG Kuan-Zhen TANG Yu 《结构化学》2008,27(4):451-454
The title compound, 1,4-dimethyl-2,5-di { [2′-(3-pyridylmethylaminoformyl)phenoxyl]- methyl}benzene perchlorate (C36H36Cl2N4O12, Mr = 787.59), has been synthesized and structurally determined by single-crystal X-ray diffraction. The crystal crystallizes in the orthorhombic system, space group Pbca with a = 14.366(4), b = 15.159(4), c = 16.443(5)A, V = 3580.9(17)/A3 Z = 4, De = 1.461 g/cm^3, /t = 0.253 mm^-1, F(000) = 1640, R = 0.0618 and wR = 0.1525 for 1615 observed reflections (I 〉 2σ(I)). In the structure of the title compound, a two-dimensional supramolecular layer is formed via intermolecular hydrogen bonding interactions. 相似文献
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The title compound trans-4-[(5-(2,4-dichlorophenoxy)-3-methyl-1-phenyl-1H-pyra-zol-4-yl)methyleneamino]-1,5-dimethyl-2-phenyl-1,2-dihydropyrazol-3-one 3 (C28H23Cl2N5O2, Mr = 532.41) has been synthesized and its crystal structure was determined by single-crystal X-ray diffraction analysis. It crystallizes in triclinic, space group P1 with a = 8.9438(4), b = 11.6065(5), c = 14.2215(6) , α = 112.566(1), β = 92.324(2), γ = 102.91(1)o, V = 1315.65(10) 3, Z = 2, Dc = 1.344 g/cm3, μ(MoKα) = 0.282 mm-1, λ = 0.71073 , F(000) = 552, the final R = 0.0587 and wR = 0.1578 for 5071 observed reflections (I > 2σ(I)). X-ray analysis reveals that the product is a thermodynamically stable trans isomer. Intra-and intermolecular C(12)-H(12)···O(1) and C(28)-H(28)···O(1)#1 hydrogen bonds were observed in the title compound. 相似文献
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The crystal structure of the title compound ethyl 3-(4-chlorophenyl)-3,4-dihydro-6- methyl-4-oxo-2-(pyrrolidin-1-yl)furo[2,3-d]pyrimidine-5-carboxylate (C20H20ClN3O4, Mr= 401.84) has been prepared and determined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group P21/n with a = 20.6215(9), b = 8.5311(4), c = 21.6886(9) A^°, β = 91.607(1)°, V = 3814.0(3)A^°^3, Z = 8, Dc = 1.400 g/cm^3, F(000) = 1680, μ = 0.233 mm^-1, R = 0.0718 and wR = 0.1545 for 6717 observed reflections with I 〉 2σ(I). X-ray diffraction analysis reveals two crystallographically independent molecules in the asymmetric unit. 相似文献