顺反构型[Rh(NH3)3Cl]在室温水溶液中的行为兼论铂配合物的抗癌机理及药效

In this paper the behaviour of mer-and fac-(Rh(NH3)3Cl3) in aqueous solution at room temperature is reported. The experimental results show that some obvious differences exist between the properties of mer-and fac-(Rh(NH3)3Cl3) coordination compounds in aqueous solution at room temperature. The fac-(Rh(NH3)3Cl3) is relatively stable, and the mer-(Rh(NH3)3 Cl3) is unstable. When one of its Cl^- is replaced by H2O(RH(NH3)3)(OH)2Cl2)Cl is formed. The mechanism of anti-tumour action of platinum compounds is briefly discussed.     

15-冠-5硝酸钸的晶体结构

The crystal of 15-crown-5-cerium nitrate belongs to the monoclinic system. This intensities of 2856 independent reflections were collected using the four-circle diffractometer of type PW-1100. The structure was solved by the heavy-atom method. The structure parameters were refined by block-diagonal matrix least- squares calculations to R=0.073. The cerium atom is coordinated by five crown ether oxygens and six oxygens in the nitrates     

配合物稳定性与配位体酸碱强度间的直线自由能关系 III:N-(间取代苯基)氨基乙酸的铜(II)、镍(II)配合物稳定性及热力学性质的研究

The stepwise formation constants of complex compounds formed from N-(m-substituted-phenyl) glycines (m-RC6H4NHCH2COOH(m-RPhG), R = H, CH3, CH3O, Cl, NO2) with Cu(II) and Ni(II) were determined by pH method at 15, 25 35`C in 30% (V/V) ethanol solution in the presence of 0.1m NaClO4. Their thermodynamical parameters were calculated. It was found that the N-(m-substituted-phenyl) glycine complexes also showed linear free energy relationships between the stability of complex compounds and the base strength of the ligands just as the para-substituted isomers reported previously. Linear relationships not only existed between their thermodynamical parameters and the base strength of the ligands but also existed between the formation enthalpy of complex compounds and the neutralization enthalpy of the ligands and between the formation entropy of complex compounds and neutralization entropy of the ligands as well.     

丁撑桥联蝶状铁硫原子簇配合物[(μ-ZS)Fe2(CO)6[μ-S(CH2)4-S-μ[(μ-ZS)Fe2(CO)6]的合成结构及构象

双Grignard试剂BrMg(CH2)4MgBr可还原断裂两分子μ-S2Fe2(CO)6的硫-硫键,生成丁撑桥联双簇铁硫中间物A, [(μ-BrMgS)Fe2(CO)6]μ-S(CH2)4S-μ-[(μ-BrMgS)Fe2(CO)6], A于原位(in situ)进一步同卤代烃、氯甲醚、氯代酮、氯代酯或酰氯作用, 共得到10个结构新颖的丁撑桥联双簇铁硫配合物B, [(μ-ZS(Fe2(CO)6]μ-S(CH2)4S-μ[(μ-ZS)Fe2(CO)6]. 除通过IR、^1H NMR及碳氢分析证实上述配合物的结构和推得某些配合物可能的构象外, 还用X衍射法确证了其中一个配合物B(1)的结构和构象.     

μ-联硫六羰基二铁与芳炔基Grignard试剂加成反应的研究 - “开环”和“闭环”铁硫原子簇配合物的合成、结构及形成机理

芳炔基溴化镁断裂μ-S2Fe2(CO)6的S-S键生成“开环”中间物(μ-ArC≡CS)(μ-BrMgS)Fe(CO)6D及“闭环”中间物μ-[S(Ar)C=C(MgBr)S]Fe2(CO)6E的平衡混合物. 该混合物用Cp(CO)2FeI或某些卤代物处理后生成相应的“开环”铁硫配合物;用CF3CO2H, HBr气体及CH3HgCl处理则得相应“闭环”铁硫配合物; 在与易消除卤化氢的卤代烃反应时也生成“闭环”配合物, 这类卤代烃可能是按消除HX过程而起作用; 对可能的机理进行了讨论.     

模拟细胞色素P-450的仿生氧化反应的研究 I:氯合5,10,15,20-四苯基卟吩合铁(III)催化下不同亚碘酰芳烃及其衍生物的结构对环己烷充氧化反应的影响

在氯合5,10,15,20-四苯基卟吩合铁(III)[TPPFe(III)Cl]催化下, 带有不同取代基的亚碘酰苯和亚碘酰苯的衍生物作充氧化剂对环己烷进行了仿生单充氧化反应的研究.取代亚碘酰苯中对位取代基的电子效应和间位取代基的电子及立体效应对氧化产物环己醇的产率有良好线性相关性. 亚碘酰苯的衍生物苯亚碘酸二醋酐与苯亚碘酸单对甲苯磺酸酐对环己烷的充氧化能力和邻、间、对亚碘酰苯甲酸与邻亚碘酰苯甲酸酯相似, 环己醇产率接近零. 从而提出亚碘酰苯甲酸及邻亚碘酰苯甲酸酯存在分子内或分子间I(oh)oco成键结构的论点.     

钯催化烯丙基偕二醇二醋酸酯和各种亲核试剂的反应

研究了配体对烯丙基-1,1-偕二醇二醋酸酯(1)在钯配合物催化下和丙二酸酯钠盐反应的影响. 当用PPh3为配位体时, 丙二酸酯碳阴离子进攻在羰基碳上, 当用dppe为配体时, 进攻在烯丙基碳上. 亲核试剂的性质也影响反应进攻的位置. 通过选择适当的亲核试剂和配体可以从1得到二次烷基化的产物.     

含Fe3S3簇核的两个异构体化合物的合成和结构研究

用氯化亚铁、苯硫酚钠及溴化四乙基铵在乙腈溶液中, 经一步反应, 得到两个同分异构的化合物α-[Et4N]3[Fe3(PhS)3Cl3Br3]1和β-[Et4N]3[Fe3(PhS)3Cl3Br3]2. X射线晶体结构测定表明, 1和2的阴离子骨架为3Fe、3S交叉排列的六元环, 前者为扭船型,后者为椅型. 1属单斜晶系, 空间群C2/c, 晶胞参数: a=24.569(4), b=13.504(2),c=18.348(3)埃, β=110.78(1)°. Z=4, R=0.070. 2属三方晶系, 空间群P3cl, 晶胞参数: a=b=13.720(3), c=35.748(5)埃, Z=4, R=0.059. 讨论了反应和结构特点.     

1,1'-[四甲基二硅撑]二环戊二烯基二氯化钛的合成与结构

以1,2-二氯四甲基二硅烷相继与环戊二烯基钠、正丁基锂和四氯化钛作用合成了标题化合物[(Me)2Si]2(C5H4)2TiCl2. 通过元素分析、紫外光谱、^1H核磁谱、质谱的测定, 证明其结构与预见相符, 并进行了X射线结构分析, 确证了其分子结构. 该晶体属地单斜晶系. 测定所得键长、键角值与三个碳原子桥连的类似物(CH2)3(C5H4)2TiCl2中的对应值相近.     

配合物稳定性与配位体酸碱强度之间的直线自由能关系 IX: Cu(II)[或Ni(II)]-2,2'-联吡啶-N,N'-双(对位取代苯基)乙二胺三元配合物体系的研究

报导了以2,2'-联吡啶为第一配体, N,N'-双(对位取代苯基)乙二胺为第二配体的Cu(II)、Ni(II)三元配合物稳定性的研究, 发现三元配合物的稳定性与第二配体的碱性强度之间存在线性自由能关系.