Co-crystal of succinic acid with imidazolidin-2-one: crystal structure and hirshfeld surface analysis

The co-crystal of succinic acid with imidazolidin-2-one was mechanochemically prepared and its structure was studied by powder and single-crystal X-ray diffraction. This compound crystallizes in the triclinic system with space group P-1. The molecular structure and crystal packing are stabilized mainly by intermolecular O--H···O and N--H···O hydrogen bonds interactions, forming a supramolecular assembly with bi-dimensional hydrogen bond networks along the [110] diagonal joined by C44(22) chains and R22(8) amide-acid dimers which running along the ba plane. These hydrogen bonds contribute to the stabilization of the crystal structure that packs with an efficiency of 69.1 % in a planar sheet structure similarly to the even diacid co-crystals containing imidazolidin-2-one. Hirshfeld surface analysis was used for visually analyzing intermolecular interactions in the crystal structure

Synthesis, Crystal and Molecular Structure, and Hydrogen-bonding Patterns in Hydantoin-L-Aspartic Acid

La hidantoina del ácido L-aspártico, C5H6N2O4, cristaliza en el sistema ortorrómbico con grupo espacial P212121 (Nº19), Z=4, y parámetros de celda unidad a= 7,597(1) Å, b= 8,591(1) Å, c= 9,447(1) Å, V= 616,6(2) Å3. En la estructura cristalina de este compuesto, las moléculas están unidas por enlaces de hidrógeno del tipo N---H···O y O---H···O, creando estructuras en cadenas y ciclos con grafos C(4), C(6), C(8), R33(15), R44(20) que forman una red tridimensional59-64gerzon@ula.veCuatrimestralHydantoin-L-aspartic acid, C5H6N2O4, crystallize in the orthorhombic system with space group P212121 (Nº19), Z=4, and unit cell parameters a= 7.597(1) Å, b= 8.591(1) Å, c= 9.447(1) Å, V= 616.6(2) Å3. In the crystal structure of the title compound the molecules are joined by N---H···O and O---H···O hydrogen bonds into chain and cyclic structures with graph-set C(4), C(6), C(8), R33(15), R44(20) forming a three-dimensional network

Synthesis and crystal structure analysis of the magnetic ternary compound Mn2GeTe4

Se prepararon muestras del ternario Mn2GeTe4 utilizando el método de fusión y recocido. Los resultados del estudio por difracción de rayos-X en muestras policristalinas, indican que este material cristaliza con simetría ortorrómbica, grupo espacial Pnma, y parámetros de celda unidad: a = 13.950(2) Å, b = 8.115(1) Å, c = 6.592(1) Å, V = 746.2(2) Å3. El refinamiento Rietveld convergió a los valores de las figures de mérito Rp = 6.9%, Rwp = 8.6%, Rexp = 5.6% y 2 = 2.4. Mn2GeTe4 es el primer derivado con teluro de la familia de compuestos del tipo II2- IV-VI4 que cristaliza con una estructura tipo [email protected]@[email protected]@[email protected] of the ternary phase Mn2GeTe4 were synthesized by direct fusion using the anneal method. X-ray powder diffraction results indicated that this material crystallizes with orthorhombic symmetry, space group Pnma, and unit cell parameters: a = 13.950(2) Å, b = 8.115(1) Å, c = 6.592(1) Å, V = 746.2(2) Å3. The Rietveld refinement converged to the figures of merit Rp = 6.9%, Rwp = 8.6%, Rexp = 5.6% and 2 = 2.4. Mn2GeTe4 is the first telluride of the II2-IV-VI4 family that crystallizes with olivine-type structure