Producción Científica Profesorado

Do Spiroarsoranes Exhibit Polytopal Equilibrium in Solution?



Mendoza Huizar, Luis Humberto

2010

Do Spiroarsoranes Exhibit Polytopal Equilibrium in Solution Antonio R.Tapia-Benavides, Luis H. Mendoza-Huizar, Francisco Pérez-Garca, Hugo Tlahuext, Alejandro Alvarez and Margarita Tlahuextl. Inorg. Chem., 2010, 49 (4), pp 14961502. DOI: 10.1021/ic901740


Abstract


The spiroarsoranes 5-phenyl-1,6-dioxa-4,9-diaza-5?5-arsaspiro[4.4]nonane (6), (3R,8R)-3,8-dimethyl-5-phenyl-1,6-dioxa-4,9-diaza-5?5-arsaspiro[4.4]nonane (7), (2S,7S)-2,7-dimethyl-5-phenyl-1,6-dioxa-4,9-diaza-5?5-arsaspiro[4.4]nonane (8), and (3S,8S)-3,8-dimethyl-(2R,7R)-2,5,7-triphenyl-1,6-dioxa-4,9-diaza-5?5-arsaspiro[4.4]nonane (9) were prepared by reaction of phenylarsonic acid and the correspondig amino alcohol. The presence of polytopal ? ? equilibrium in 6?9 was demonstrated by HPLC and NMR studies. NBO computations at the MP2/6-31+G(2d,2p) level indicate that methyl substitution in C2 or C3 of the oxazarsolane ring determines the predominance of ? or ? stereoisomers. GIAO B3LYP/6-311++G(2d,2p) computations were used to assign experimental 1H and 13C NMR spectra.



Producto de Investigación




Artículos relacionados

Synthesis and crystal structures of cis-palladium(II) and cis-platinum(II) complexes containing di...

Analysis of the experimental pressuretemperature behavior in the isotropicnematic phase transition f...

Influence of the Cation Nature of the Sulphate Salt on the Electrochemical Synthesis of Sulfate-Dope...

Estudio de las Interacciones Ácido Húmico-Metales Pesados y Determinación de sus Constantes de Estab...

Nucleation and Growth Kinetics of Electrodeposited Sulfate-Doped Polypyrrole: Determination of the D...

Mercury Ions Removal from Aqueous Solution Using an Activated Composite Membrane

Análisis del Comportamiento Presión-Temperatura en la Transición Isotrópico-Nemático del p-Azoxianis...

Quantum chemical study of the electrochemical reduction of the [Co(H2O)6]2+ and [Co(NH3)5(H2O)]2+ io...

ELECTROCHEMICAL STUDY ABOUT ZINC ELECTRODEPOSITION ONTO GCE AND HOPG SUBSTRATES

Influence of the Crystallinity of the Substrate on Kinetic Parameters of Zinc Electrodeposition Proc...