In the title compound, [Pd(C(5)H(8)NO(4))(2)], the Pd(II) atom is coordinated by two O atoms and two N atoms of two N,O-chelating hydrogen l-glutatmate ligands in a square-planar geometry with the N and O atoms in a mutually trans arrangement. The complex units are embedded in a network of N-H⋯O and O-H⋯O hydrogen-bonding inter-actions that stabilize the three-dimensional crystal structure. The strongest hydrogen bonds are formed between the γ-COOH untis of adjacent glutamate ligands, leading to dimers of the type R(2) (2)(8) with O⋯O separations of 2.640 (6) Å.
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http://dx.doi.org/10.1107/S1600536811035860 | DOI Listing |
Acta Crystallogr C Struct Chem
January 2025
Department Chemie, Ludwig-Maximilians Universität, Butenandtstrasse 5-13 (Haus D), D-81377 München, Germany.
Methyl prop-2-ynoate (CHO) was investigated in the binary superacidic system HF/MF (M = Sb or As) and dimethyl fumarate (CHO) in the superacidic system HF/SbF, as well as HF/BF. The starting materials methyl prop-2-ynoate and dimethyl fumarate were crystallized, the former for the first time. The protonated species of these esters, namely, (1-methoxyprop-2-yn-1-ylidene)oxidanium hexafluoroarsenate, CHO AsF, 1,4-dimethoxy-4-oxobut-2-en-1-ylidene]oxidanium tetrafluoroborate bis(hydrogen fluoride), CHO BF 2HF, and hemi{[1,4-dimethoxy-4-oxidaniumylidenebut-2-en-1-ylidene]oxidanium} undecafluorodiantimonate, 0.
View Article and Find Full Text PDFActa Crystallogr C Struct Chem
August 2024
Department Chemie, Ludwig-Maximilians Universität München, Butenandtstrasse 5-13 (Haus D), D-81377 München, Germany.
The structure of cis- or trans-bridged [GeF] anionic chains have been investigated [Mallouk et al. (1984). Inorg.
View Article and Find Full Text PDFActa Crystallogr E Crystallogr Commun
June 2022
L. V. Pisarzhevskii Institute of Physical Chemistry of the National Academy of Sciences of Ukraine, Prospekt Nauki 31, Kiev 03028, Ukraine.
In the asymmetric unit of the title compound, -di-aqua-(1,4,8,11-tetra-aza-cyclo-tetra-decane-κ , , , )zinc(II) -bis-(hydrogen 4-phospho-natobiphenyl-4'-carboxyl-ato-κ)(1,4,8,11-tetra-aza-cyclo-tetra-decane-κ , , , )zinc(II), [Zn(CHN)(HO)][Zn(CHOP)(CHN)], both Zn atoms lie on crystallographic inversion centres and the atoms of the macrocycle in the cation are disordered over two sets of sites. In both macrocyclic units, the metal ions possess a tetra-gonally elongated ZnNO octa-hedral environment formed by the four secondary N atoms of the macrocyclic ligand in the equatorial plane and the two O atoms of the water mol-ecules or anions in the axial positions, with the macrocyclic ligands adopting the most energetically favourable -III conformation. The average Zn-N bond lengths in both macrocyclic units do not differ significantly [2.
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August 2020
Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp. 31, Moscow 119991, Russian Federation.
The title compound, CHNO·2HO, is the richest (by molar ratio) in hydrogen peroxide among the peroxosolvates of aliphatic α-amino acids. The asymmetric unit contains a zwitterionic pipecolinic acid mol-ecule and two hydrogen peroxide mol-ecules. The two crystallographically independent hydrogen peroxide mol-ecules form a different number of hydrogen bonds: one forms two as donor and two as acceptor ([2,2] mode) and the other forms two as donor and one as acceptor ([2,1] mode).
View Article and Find Full Text PDFActa Crystallogr E Crystallogr Commun
April 2017
Department of Physics, Faculty of Arts and Sciences, Ondokuz Mayıs University, Kurupelit, Samsun 55139, Turkey.
The asymmetric unit of the title compound, CHN·2CHO, comprises two hydrogen squarate (Hsq; systematic name: 2-hy-droxy-3,4-dioxo-cyclo-butano-late) anions and a 2-(aza-niumylmeth-yl)pyridinium dication. The squaric acid mol-ecules each donate an H atom to the N atoms of the pyridine ring and the amino-methyl units of a 2-(amino-meth-yl)pyridine mol-ecule, forming the 1:2 salt. The Hsq anions are linked by strong O-H⋯O hydrogen bonds and an N-H⋯O hydrogen bond links the 2-(aza-niumylmeth-yl)pyridinium cation to one of the squaric acid anions.
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