Binuclear complexes of a new hexadentate macrocyclic ligand. The crystal and molecular structure of [LCu2(CH3CO2)2](ClO4)2·5H2O
摘要:
The 30-membered hexaaza macrocylic ligand, L (L = 3,7,11,18,22,26-hexaazatricyclo-[26.2.2.2(13,16)tetratriaconta-1(31),13(33),14,16(34),28(32),29-hexaene), is capable of forming binuclear complexes with the divalent transition metal ions Ni, Cu and Zn. The two metal ions are bound by the two dipropylenetriamine units of the macrocycle. Extra coordination sites on the metal ions can be occupied by exogenous ligands such as acetate, chloride and thiocyanate. The crystal structure of one of the di-copper complexes is described: [LCu2(CH3CO2)2](ClO4)2.5H2O crystallizes in the monoclinic space group P2(1)/c (No. 14), with a = 9.369(2), b = 17.644(3), c = 27.466(3) angstrom, beta = 92.90(1)-degrees, U = 4534.7 angstrom3 and Z = 4. The Cu1 ... Cu2 separation is 8.40(3) angstrom. The access for potential exogenous bridging ligands, to the cavity between the copper ions, is somewhat restricted by the two phenyl units of the macrocycle which appear almost parallel in the structure. The redox potential of the couple L(Cu2+)2/L(Cu+)2, recorded by cyclic voltammetry for the chloride adduct, [LCu2Cl2]Cl2.5H2O, is -0.061 V versus SCE in DMF.
7·1/3CH2Cl2 and 8. The Zn complexes 5, 7·1/3CH2Cl2and 8 containing chloride ligands present a distorted N2Cl2 tetrahedral coordination with two non-coordinated N atoms of the macrocyclic ligand. On the other hand, complex 3, which contains nitrate ligands, displays an N3O2 pentacoordination with all the N atoms of the macrocyclic ligand bonded to the metal centres. The different factors governing the relative
含有双核六氮杂大环配体 (L) 和阴离子配体 (X) 的通式 [Zn2(X)4−n(L)]n+ (1−8; L = H2p、H3p、Me2p、Me2m、Me3p、Me3m;X = Cl,n = 0;X = NO3,n = 2) 已被研究。通过 X 射线衍射分析对配合物 3、5、7·1/3CH2Cl2 和 8 进行了固态结构表征。含有氯化物配体的锌配合物 5、7·1/3CH2Cl2 和 8 呈现扭曲的 N2Cl2 四面体与大环配体的两个非配位 N 原子配位。另一方面,含有硝酸盐配体的配合物 3 显示出 N3O2 五配位,大环配体的所有 N 原子都与金属中心键合。讨论了控制相对 Zn-Zn 配置的不同因素。溶液中的 NMR 光谱揭示了流动行为的存在以及与固态完全不同的结构排列。特别是,对于氯化物配合物 2 和 4-8,获得了涉及所有大环配体氨基 N 原子的 Zn-N 键的形成和断裂的证据。最后,配合物
METHODS AND COMPOSITIONS FOR TREATING BIOFILMS
申请人:PRESIDENT AND FELLOWS OF HARVARD COLLEGE
公开号:US20140056951A1
公开(公告)日:2014-02-27
Methods of treating or reducing biofilms, treating a biofilm-related disorder, and preventing biofilm formation using polyamines is described.
METHODS AND COATINGS FOR TREATING BIOFILMS
申请人:President and Fellows of Harvard College
公开号:US20140056952A1
公开(公告)日:2014-02-27
Methods of treating or reducing biofilms, treating a biofilm-related disorder, and preventing biofilm formation using polyamines is described.
[EN] METHODS AND COATINGS FOR TREATING BIOFILMS<br/>[FR] PROCÉDÉS ET REVÊTEMENTS POUR TRAITER DES BIOFILMS
申请人:HARVARD COLLEGE
公开号:WO2012151555A1
公开(公告)日:2012-11-08
Methods of treating or reducing biofilms, treating a biofilm-related disorder, and preventing biofilm formation using polyamines is described.
[EN] POLYAMINES FOR TREATING BIOFILMS<br/>[FR] POLYAMINES UTILISABLES EN VUE DU TRAITEMENT DE BIOFILMS
申请人:HARVARD COLLEGE
公开号:WO2012151554A1
公开(公告)日:2012-11-08
Methods of treating or reducing biofilms, treating a biofilm-related disorder, and preventing biofilm formation using polyamines is described.