Aggregation of chiral hexanuclear complex-cations into cationic metallosupramolecules with concomitant aggregation of inorganic counter-anions into anionic clusters

CrystEngComm ◽  
2012 ◽  
Vol 14 (6) ◽  
pp. 1936 ◽  
Author(s):  
Raeeun Lee ◽  
Asako Igashira-Kamiyama ◽  
Hiroki Motoyoshi ◽  
Takumi Konno
Keyword(s):  
Anionic Clusters ◽  
Hexanuclear Complex

Ionically Self-Assembled Clustomesogen with Switchable Magnetic/Luminescence Properties Containing [Re6Se8(CN)6]n−(n= 3, 4) Anionic Clusters

2011 ◽  
Vol 23 (23) ◽  
pp. 5122-5130 ◽  
Author(s):  
Yann Molard ◽  
Alexandra Ledneva ◽  
Maria Amela-Cortes ◽  
Viorel Cı̂rcu ◽  
Nikolai G. Naumov ◽  
...  
Keyword(s):  
Luminescence Properties ◽  
Anionic Clusters ◽  
Self Assembled

Preparation, Structure and Gold(I) Complexation of p-Xylylene-1,4-diphosphines

2005 ◽  
Vol 60 (5) ◽  
pp. 511-519 ◽  
Author(s):  
Stephan A. Reiter ◽  
Stefan D. Nogai ◽  
Hubert Schmidbaur
Keyword(s):  
Ligand Exchange ◽  
Mirror Symmetry ◽  
High Yield ◽  
Substitution Pattern ◽  
Stable Species ◽  
Structural Details ◽  
Inductive Effects ◽  
Complex Salts ◽  
Hexanuclear Complex ◽  
Dimethyl Benzene

1,4-Dimethyl-2,5-di(phosphinyl)benzene (1) was prepared in high yield in a four-step synthesis from 1,4-dibromo-2,5-dimethyl-benzene. The intermediates with (Et2N)2P and Cl2P groups (2, 3) with the corresponding substitution pattern have been isolated and structurally characterized. All three compounds (1 - 3) adopt a centrosymmetrical conformation with one of the P-X bonds of each X2P group located in the ring plane while the other reaches out from this plane in a roughly perpendicular orientation. Distortions of the ring and its substituents from a standard planar hexagonal geometry are readily explained by invoking steric and inductive effects. The crystal structure of 1,4-dibromo-2,5-dimethyl-benzene has also been determined for reference purposes. Compound 1 was employed as a substrate for auration by tri(gold)oxonium salts of the type {[(R3P)Au]3O}BF4. Hexanuclear complex salts of the type {[(R3P)Au]3P(C6H2Me2)P[Au(PR3)]3}(BF4)2 were obtained in almost quantitative yield with R3P = tBu3P (4) and Ph3P (5). The former (4) has the higher thermal stability, it could be crystallized and its structure determined. It features a conformation in which the xylene plane bisects one of the Au-P-Au angles at both tetrahedrally coordinated central phosphorus atoms placing its methyl groups in sterically least hindered positions. Compound 5 is labile in solution and shows rapid ligand exchange on the NMR time scale. The limited stability has also been confirmed by mass spectrometry. Similar structural details and differences in stability were observed in the related trinuclear gold complexes based on 1-naphthyl-phosphine, which were prepared as reference materials using the same preparative procedure. Of the two compounds {(1-C10H7)- P[Au(PR3)]3}BF4, with R3P = tBu3P (6) and Ph3P (7), the former is the more stable species. In the solid state the cation approaches mirror symmetry in a conformation comparable to that of 4. Compound 7 is thermally labile and shows a rapid ligand exchange in solution.

scholarly journals Hydrogen bonded networks based on hexarhenium(iii) chalcocyanide cluster complexes: structural and photophysical characterization

2018 ◽  
Vol 42 (14) ◽  
pp. 11888-11895
Author(s):  
Alexandra Ledneva ◽  
Sylvie Ferlay ◽  
Nikolay G. Naumov ◽  
Matteo Mauro ◽  
Stéphane Cordier ◽  
...  
Keyword(s):  
Cluster Complexes ◽  
Anionic Clusters ◽  
Hydrogen Bonded

Two series of hydrogen bonded networks based on [Re6Qi8(CN)a6]4− (Q = S or Se) anionic clusters and amidinium cations are reported, structurally and spectroscopically analyzed.

η3-Allylmeta]l-Schwefel-Komplexe, VI. Anionische η3-Allylnickel- und -palladium-Schwefel-Cluster/ η3-Allylmetal-Sulfur-Complexes, VI. Anionic η3-Allylnickel- and -palladium-Sulfur-Clusters

1983 ◽  
Vol 38 (5) ◽  
pp. 604-610 ◽  
Author(s):  
Reinhard Benn ◽  
Borislav Bogdanović ◽  
Peter Göttsch ◽  
Martin Rubach
Keyword(s):  
Crystal Structure ◽  
Nmr Spectra ◽  
Ionic Structure ◽  
Butyl Lithium ◽  
Sulfur Cluster ◽  
Anionic Clusters ◽  
H Nmr ◽  
Trigonal Bipyramidal ◽  
Lithium Sulfide

Abstractη3-Allylhydrogensulfidonickel (2) reacts with n-butyllithium with elimination of lithium sulfide and formation of the ionic η3-allylnickel-sulfur-cluster [(η3-C3H5Ni)3S2]+[Li(THF)2]- (4). The crystal structure of the analogous THF-TMEDA-adduct (4′) indicates that the nickel and sulfur atoms of the anion adopt a trigonal bipyramidal arrangement, in which the sulfur atoms are at the apices of the bipyramid. The Li(THF)2+ cation in 4 can be replaced by the (n-C4H9)4N+ cation (5). The 1H NMR spectra suggest the presence of two stereoisomers of the anionic clusters in 4 and 5 having C3h and Cs symmetry. In the reaction of η3-allyl- or η3-methallylhydrogensulfidopalladium (6, 6 a) with n-butyl-lithium crystalline compounds having the composition RC3H4PdSLi(THF)≈4, R = H, CH3 (7, 7 a) are obtained; their 1H NMR spectra also reveal the existence of the two stereoisomers having C3h and Cs symmetry. The same type of stereoisomerism is observed with the crystalline [(n-C4H9)4N]+[(η3-C3H5Pd)3S2]- (8) obtained from 7 and (n-C4H9)4N+ClO4-. For 7 and 7 a an ionic structure consisting of trigonal bipyramidal (η3-RC3H4Pd)3S2- anions and Li3S(THF)4+ cations is proposed.

Tailoring ionic liquid catalysts: structure, acidity and catalytic activity of protonic ionic liquids based on anionic clusters, [(HSO4)(H2SO4)x]− (x = 0, 1, or 2)

2014 ◽  
Vol 16 (7) ◽  
pp. 3463-3471 ◽  
Author(s):  
Karolina Matuszek ◽  
Anna Chrobok ◽  
Fergal Coleman ◽  
Kenneth R. Seddon ◽  
Małgorzata Swadźba-Kwaśny
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Ionic Liquids ◽  
Chemical Properties ◽  
Esterification Reaction ◽  
Anionic Clusters ◽  
Physico Chemical

The speciation of a family of inexpensive, easily prepared protonic ionic liquids, their physico-chemical properties and their performance as catalysts in the model esterification reaction have been correlated.

Electrochemical sensing of nitrite using a copper–titanium oxide composite derived from a hexanuclear complex

RSC Advances ◽  
2016 ◽  
Vol 6 (33) ◽  
pp. 27852-27861 ◽  
Author(s):  
Muhammad Ali Ehsan ◽  
Rabia Naeem ◽  
Vickie McKee ◽  
Abbas Hakeem Saeed ◽  
Alagarsamy Pandikumar ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Chemical Vapour Deposition ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Electrochemical Sensing ◽  
Deposition Technique ◽  
Oxide Composite ◽  
Molecular Precursor ◽  
Chemical Vapour Deposition Technique ◽  
Hexanuclear Complex

An electrochemical nitrite ions sensor electrode, CuO–2TiO2, has been developed using single molecular precursor [Cu2Ti4(O)2(OH)4(TF)8(THF)6]·THF in aerosol assisted chemical vapour deposition technique.

The preparation and structures of two Ge-Co-Fe anionic clusters; [GeCoFe3(CO)14]− and [Ge2CO5Fe2(CO)22]−

1992 ◽  
Vol 441 (1) ◽  
pp. 35-43 ◽  
Author(s):  
Skelte G. Anema ◽  
Glen C. Barris ◽  
Kenneth M. Mackay ◽  
Brian K. Nicholson
Keyword(s):  
Anionic Clusters
Sign in / Sign up

Export Citation Format

Share Document