Structural Characterization of Novel Ionic Salts Incorporating Trihalide Anions

2009 ◽  
Vol 62 (4) ◽  
pp. 334 ◽  
Author(s):  
Pamela M. Dean ◽  
Bronya R. Clare ◽  
Vanessa Armel ◽  
Jennifer M. Pringle ◽  
Craig M. Forsyth ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Physical Properties ◽  
Crystal Structures ◽  
Structural Characterization ◽  
Lower Melting ◽  
Ionic Salts ◽  
First Time

The crystal structures of several low-melting salts containing trihalide ions, namely 1-ethyl-3-methylimidazolium tribromide ([C2mim][Br3]), 1-ethyl-1-methylpyrrolidinium tribromide ([C2mpyr][Br3]), and 1-propyl-1-methylpyrrolidinium triiodide ([C3mpyr][I3]), are reported for the first time. Thermal analysis reveals that the tribromide salts are lower-melting than their monohalide analogues. Analysis of the crystal structures allows examination of the influence of the anions on the physical properties of the salts.

Wechselwirkungen in Kristallen, 112 [1]. Tetra(2-pyridyl)pyrazin - ein vielseitiger Ligand für Lewis-Säuren: Halb- und doppelschalige Komplexe von Kupfer(II)- und Nickel(II)-Salzen / Interactions in Crystals, 112 [1]. Tetra(2-pyridyl)pyrazine - a Versatile Ligand for Lewis Acids: Semi- and Doubly-Encapsulated Complexes of Copper(II) and Nickel(II) Salts

1997 ◽  
Vol 52 (4) ◽  
pp. 515-523 ◽  
Author(s):  
Hans Bock ◽  
Holger Schödel ◽  
Thorsten Vaupel
Keyword(s):  
Crystal Structures ◽  
Structural Characterization ◽  
Lewis Acids ◽  
Reduction Potential ◽  
Polymer Chains ◽  
Distorted Octahedron ◽  
Extensive Search ◽  
Structural Database ◽  
First Time

Preceding cyclovoltammetric measurements of tetra(2-pyridyl)pyrazine (TPP) in aprotic THF solution and the lowering of the reduction potential on Li+[B(C6H5)4 ] addition, the crystallization of diprotonated [TPPH2++][B(CAH5)4-]2 and of [2,4,6-tris(2-pyridyl)-1,3,5- triazine(Li+)][B(C6H5)4-] have stimulated the preparation and structural characterization of the following (TPP)1,2 copper(II) and (TPP)2 nickel(II) salts: (1) Green TTP-copper(II)- dichlorideacetonitrile with Cu2+ fivefold coordinated by three N contacts to one TPP ligand and by two Cl anions, (2) green di(TPP)-copper(II)-di(perchlorate)·2 acetonitrile with fully encapsulated Cu2+ coordinated to six N centers of two TPP ligands, and (3) the analogous nickel(II) complex, brown di(TPP)-nickel(II)-bis-(tetrafluoroborat)·3 water-methanol. Both complexes [(TPP)Me2+(TPP)](X-)2 with the Me2+ dications in the cavity provided by two twisted TPP ligands are reported for the first time. The discussion of the crystal structures is based on an extensive search in the Cambridge Structural Database, which confirms the distortion mode around the penta-coordinated Cu2+ center, and a more strongly distorted octahedron at the Cu2+ center relative to that at the six-coordinate Ni2+ center as well as shorter contacts Me2+ ··· N to the pyrazine N centers than to the pyridine N centers. The comparison of the monodentate terpyridyl ligand with the bidentate tetra(2-pyridyl)pyrazine suggests the preparation of Me+n-bridged polymer chains terminated by terpyridyl complexation.

Structural characterization of folded and extended conformations in peptides containing γ amino acids with proteinogenic side chains: crystal structures of γn, (αγ)n and γγδγ sequences

2015 ◽  
Vol 39 (5) ◽  
pp. 3319-3326 ◽  
Author(s):  
Madhusudana M. B. Reddy ◽  
K. Basuroy ◽  
S. Chandrappa ◽  
B. Dinesh ◽  
B. Vasantha ◽  
...  
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Crystal Structures ◽  
Structural Characterization ◽  
Side Chains ◽  
Amino Acid Residues

γn amino acid residues can be incorporated into structures in γn and hybrid sequences containing folded and extended α and δ residues.

scholarly journals Transition metal complexes with thiosemicarbazide-based ligands. Part 60. Reactions of copper(II) bromide with pyridoxal S-methylisothiosemicarbazone (PLITSC). Crystal structure of [Cu(PLITSC−H)H2O]Br•H2O

2014 ◽  
Vol 79 (3) ◽  
pp. 291-302 ◽  
Author(s):  
Vukadin Leovac ◽  
Ljiljana Vojinovic-Jesic ◽  
Sonja Ivkovic ◽  
Marko Rodic ◽  
Ljiljana Jovanovic ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermal Analysis ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Elemental Analysis ◽  
Structural Characterization ◽  
Electronic Spectra ◽  
Square Planar

The synthesis and structural characterization of a square-planar copper(II) complex with pyridoxal S-methylisothiosemicarbazone (PLITSC) of the formula [Cu(PLITSC?H)H2O]Br?H2O (1) as the first Cu(II) complex with monoanionic form of this ligand were described. Complex 1 together with two previously synthesized complexes [Cu(PLITSC)Br2] (2) and [Cu(PLITSC)Br(MeOH)]Br (3) were characterized by elemental analysis, IR and electronic spectra and also by the methods of thermal analysis, conductometry and magnetochemistry.

Synthesis of tetraarylborates via tetralithio intermediates and the effect of polar functional groups and cations on their crystal structures

2018 ◽  
Vol 47 (46) ◽  
pp. 16627-16637 ◽  
Author(s):  
Patryk Tomaszewski ◽  
Marcin Wiszniewski ◽  
Janusz Serwatowski ◽  
Krzysztof Woźniak ◽  
Krzysztof Durka ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Functional Groups ◽  
Structural Characterization ◽  
X Ray ◽  
Polar Functional Groups

The synthesis and X-ray structural characterization of functionalized (COOH, CHO, C(O)NHtBu, B(OH)2) tetraphenyl- and tetrakis(4′-biphenylyl)borates is reported.

Spectroscopic and structural characterization of three silaisocyanides: exploring an elusive class of reactive molecules at high resolution

2015 ◽  
Vol 51 (56) ◽  
pp. 11305-11308 ◽  
Author(s):  
Sven Thorwirth ◽  
Ralf I. Kaiser ◽  
Kyle N. Crabtree ◽  
Michael C. McCarthy
Keyword(s):  
High Resolution ◽  
Spectral Resolution ◽  
Structural Characterization ◽  
High Spectral Resolution ◽  
First Time

The fundamental silaisocyanides HCCNSi, HC4NSi, and NCNSi have been characterized at high spectral resolution for the first time. All three chains are good candidates for radio astronomical detection.

Chemical Reactivity of Tetrasulfur Tetranitride: Synthesis, Physical Properties, and Structural Characterization of the Amorphous Phase Cu7S4N4

2003 ◽  
Vol 629 (10) ◽  
pp. 1751-1759 ◽  
Author(s):  
Stephan H. Irsen ◽  
Peter Kroll ◽  
Richard Dronskowski ◽  
Thomas E. Weirich ◽  
Matthias Epple
Keyword(s):  
Physical Properties ◽  
Amorphous Phase ◽  
Structural Characterization ◽  
Chemical Reactivity
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