scholarly journals Zn (II) and Cu (II) Halide Complexes of Poly(propylene amine) Dendrimer Analysed by Infrared and Raman Spectroscopies

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Ivo Grabchev ◽  
Ismail Hakki Boyaci ◽  
Ugur Tamer ◽  
Ivan Petkov
Keyword(s):  
Metal Complexes ◽  
Spectral Methods ◽  
Halide Complexes ◽  
Poly Propylene

Two nondestructive and complementary spectral methods as infrared and Raman spectroscopies have been used for characterizations of poly(propylene amine) dendrimers comprising 1,8-naphthalimide units in the dendrimer periphery and their metal complexes with Cu2+ at Zn2+ ions.

Conformational variation of ligands in mercury halide complexes; high and low Z′ structures

CrystEngComm ◽  
2019 ◽  
Vol 21 (33) ◽  
pp. 4951-4960 ◽  
Author(s):  
Ali Samie ◽  
Alireza Salimi
Keyword(s):  
Metal Complexes ◽  
Halide Complexes ◽  
Mercury Halide

Small changes in the ligand resulted in a conformational variation of LPy to LPz which led to high and low Z′ structures in the corresponding metal complexes.

Phosphorus-31, cadmium-111, cadmium-113 and mercury-199 N.M.R. studies of cadmium(II) halide and mixed cadmium(II)-mercury(II) halide complexes with tributylphosphine

1980 ◽  
Vol 33 (8) ◽  
pp. 1677 ◽  
Author(s):  
R Colton ◽  
D Dakternieks
Keyword(s):  
Metal Complexes ◽  
Time Scale ◽  
Room Temperature ◽  
Chemical Shifts ◽  
Coupling Constant ◽  
Mixed Metal ◽  
Redistribution Reactions ◽  
Halide Complexes ◽  
Mixed Metal Complexes ◽  
And Shifts

Phosphorus-31, cadmium-111 and cadmium-113 n.m.r, studies have been carried out on CdX2(PBu3)2 (where X = Cl, Br, I). The results are consistent with exchange of both phosphine and halogen. Phosphine exchange becomes slow on the N.M.R. time scale in all cases by -40°C. Mixtures of CdX2(PBu3)2 with different halogens give averaged signals at room temperature, but below about -80°C exchange becomes slow and halogen redistribution reactions can be observed. ��� Reaction of CdX2 and PBu3 in 1 : 1 proportions in ethanol gives Cd2X4(PBu3)3 as the isolated product, not Cd2X4(PBu3)2. It is shown that ethanol is an effective ligand to cadmium and redistribution reactions between coordinated ethanol and the phosphine occur. ��� The mixed metal complexes CdHgX4(PBu3)2 have been shown by phosphorus-31, cadmium-113 and mercury-199 n.m.r, studies to have all the phosphine coordinated to mercury. ��� Cadmium-111 and cadmium-113 chemical shifts in these compounds span a range of over 500 ppm and shifts have been correlated with 31P chemical shifts and the coupling constant JP,Cd.

CYCLOBUTADIENE–METAL COMPLEXES: PART VIII. SYNTHESIS OF TETRAPHENYLCYCLOBUTADIENE NICKEL HALIDES BY LIGAND-EXCHANGE REACTIONS

1966 ◽  
Vol 44 (22) ◽  
pp. 2673-2677 ◽  
Author(s):  
D. F. Pollock ◽  
P. M. Maitlis
Keyword(s):  
Metal Complex ◽  
Metal Complexes ◽  
Ligand Exchange ◽  
Palladium Complexes ◽  
Exchange Reactions ◽  
Reaction Proceeds ◽  
Halide Complexes

The preparation of cyclobutadiene nickel halide complexes (R4C4NiX2)2, where R is phenyl or substituted phenyl, by reaction of the palladium complexes, [R4C4PdX2]2, with a tert-phosphine metal complex, e.g. (n-Bu3P)2NiX2, is described. The reaction proceeds according to the equation[Formula: see text]Possible mechanisms are suggested.

Phosphanchalkogenide und ihre Metallkomplexe. II. Komplexe einiger Gold(I)-Halogenide mit Diphosphanmonochalkogeniden [1] / Phosphane Chalcogenides and their Metal Complexes. II. Gold(I) Halide Complexes of some Diphosphane Monochalcogenides

2014 ◽  
Vol 69 (1) ◽  
pp. 25-48 ◽  
Author(s):  
Christina Taouss ◽  
Peter G. Jones
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Metal Complexes ◽  
Torsion Angle ◽  
Membered Ring ◽  
Gold Complex ◽  
Torsion Angles ◽  
Halide Complexes ◽  
Independent Molecules ◽  
Short Contacts

We report the crystal structures of 19 gold(I) complexes with diphosphane monochalcogenide ligands, general formula (PP)EAuHal (PP = diphosphane, E = chalcogen, Hal = halogen). For PP = bis(diphenylphosphano)methane (dppm): 1, dppmOAuCl as its diisopropyl ether solvate; 2, dppmOAuI as its dichloromethane solvate; 3, dppmSAuCl as its dichloromethane hemisolvate; 4, dppmSAuI; 5, dppmSeAuBr as a 1:1 adduct with dppmSe2; 6, dppmSeAuI. Compound 3 is isotypic to the known structure of dppmSeAuCl. Most of the structures have an E-P…P-Au torsion angle close to zero, which, especially for the larger E atoms, facilitates a close intramolecular approach of E and Au. The packing of 1-3 involves hydrogen bonds from the methylene hydrogens. For PP = 1,2-bis(diphenylphosphano)ethane (dppe): 7, dppeOAuBr and 8, dppeOAuI, both as their hemihydrates; 9, dppeSAuBr; 10, dppeSAuI. All four compounds crystallise with two independent molecules of the gold complex, between which short Au…Au contacts are observed; the molecules of 7 and 8 are further linked by hydrogen bond systems […P=O…H-O-H…O=P…]. Compounds 7 and 8 form an isotypic series with their known chloride analogue, as do 9 and 10. For PP = 1,2- bis(diphenylphosphano)benzene (dppbz): 11, dppbzOAuCl; 12, dppbzOAuBr; 13, dppbzSAuBr; 14, dppbzSAuI, 16, dppbzSeAuBr and 17, dppbzSeAuI, all as their isotypic dichloromethane disolvates; 15, dppbzSeAuCl (isotypic to 13). The absolute E-P…P-Au torsion angles are all in the range 50 - 70°; short intramolecular E…Au contacts are observed. The packing of 11-17 shows few notable short contacts. For PP = cis-1,2-bis(diphenylphosphano)ethene (cisdppen): 18, cisdppenSAuCl; 19, cisdppenSAuBr. Both compounds crystallise with two independent molecules, and in both cases the molecules display considerable differences in configuration. The packing of 18 involves short H…Cl and that of 19 short H…S contacts. For PP = 1,8-bis(diphenylphosphano)naphthalene (dppn), an inversion-symmetric gold(III) complex (dppnSeAu)2Cl2 20, with a central four-membered ring Au2Se2, was obtained instead of the expected isomeric gold(I) derivative by formal insertion of gold into a P-Se bond; it crystallised as a deuterochloroform hexasolvate.

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