Journal ArticleDOI
Metal-betaine interactions. I. Crystal structure of polymeric trans-diaquabis(pyridine betaine)manganese(II) dichloride
Xiao-Ming Chen,Thomas C. W. Mak +1 more
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TLDR
In this paper, a new polymeric betaine complex of manganese(II), of stoichiometry [Mn(C5H5NCH2COO)2 (H2O)2]C12, has been prepared and characterized by infrared spectroscopy and X-ray crystallography.Abstract:
A new polymeric betaine complex of manganese(II), of stoichiometry [Mn(C5H5NCH2COO)2 (H2O)2]C12, has been prepared and characterized by infrared spectroscopy and X-ray crystallography. The complex exhibits strong carboxylate absorptions at 1624, 1396, 1384, and 715 cm−1. The crystal structure has been refined toR
F
=0.057 for 2342 observed (∥F
0∥>6σ∥F
0∥) MoKα data. The complex consists of a packing ofsyn-anti carboxylate-bridged, one-dimensional polymeric chains running parallel to thea axis. Each Mn(II) atom is located at an inversion center, with aqua ligands occupying the trans positions in a slightly distorted octahedron. The chloride ions and aqua ligands are alternately linked by O-H⋯Cl hydrogen bonds into a (Cl−·H2O)∞ zigzag chain also running parallel to thea axis.read more
Citations
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Synthesis, Structural Characterization (X-ray and EXAFS), and Magnetic Properties of Polynuclear Manganese(II) Complexes with Chlorobenzoato Bridges
Belén Albela,Montserrat Corbella,Joan Ribas,Isabel Castro,Jorunn Sletten,Helen Stoeckli-Evans +5 more
TL;DR: In this paper, three polynuclear MnII complexes with carboxylate bridges were obtained from the reaction of Mn(RCOO)2 with 2,2‘-bipyridine (bpy).
Journal ArticleDOI
Thermodynamic assessment of the Al–Li system
Bengt Hallstedt,Olga Kim +1 more
TL;DR: In this article, a Calphad type thermodynamic assessment of the Al-Li system is presented, which is dominated by the central AlLi phase, which has an ordered bcc (B32) structure.
Journal ArticleDOI
Cadmium(II) complexes containing a discrete tetrakis-(carboxylato)-bridged dimetal core: isomorphous dinitratotetrakis(µ-triphenylphosphoniopropionate)dicadmium(II) dinitrate and diperchlorate, and dichlorotetrakis(µ-triphenylphosphoniopropionate)dicadmium(II) diperchlorate
Song-Lin Li,Thomas C. W. Mak +1 more
TL;DR: In this paper, three cadmium complexes containing the tertiary phosphine betaine ligand triphenylphosphoniopropionate have been synthesized and structurally characterized by single-crystal X-ray analysis.
Journal ArticleDOI
Metal-betaine interactions. II. Crystal structures of catena-dichloro(betaine)cadmium(II) and dimeric diaquabis(betaine)tetrachlorodicadmium(II)
Xiao-Ming Chen,Thomas C. W. Mak +1 more
TL;DR: Two cadmium(II) complexes of betaine (BET) have been prepared and characterized by X-ray crystallography as discussed by the authors, and they have been shown to be a one-dimensional polymer in which each Cadmium atom is coordinated by two pairs of bridging chlorine atoms and two oxygen atoms from different bridging carboxylate groups.
Journal ArticleDOI
pH-Specific structural speciation of the ternary V(V)-peroxido-betaine system: a chemical reactivity-structure correlation.
C. Gabriel,Efrosini Kioseoglou,J. Venetis,V. Psycharis,Catherine P. Raptopoulou,A. Terzis,George A. Voyiatzis,Marko Bertmer,C. Mateescu,Athanasios Salifoglou +9 more
TL;DR: Synthetic efforts were launched involving the physiological ligands betaine to understand the ternary vanadium-H(2)O(2)-ligand interactions relevant to that metal ion's biological role, providing insight into the chemical reactivity of V(V)-diperoxido systems and their potential link to cellular events such as insulin mimesis and anitumorigenicity modulated by the presence of betaine.
References
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International tables for X-ray crystallography
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Relationships between the carbon-oxygen stretching frequencies of carboxylato complexes and the type of carboxylate coordination
Journal ArticleDOI
A method of absorption correction by X-ray intensity measurements
G. Kopfmann,Robert Huber +1 more
TL;DR: In this article, the theoretical and experimental principles of a method which permits an approximate evaluation of the absorption correction by intensity measurements with the aid of a four-circle diffractometer are described.
Journal ArticleDOI
Profile analysis in single-crystal diffractometry
TL;DR: It is shown that a suitable curve fitting procedure can reduce the standard deviation of intensity measurements made with a scanning diffractometer except when the intensity is large in relation to the background level.