Producción Científica Profesorado

Do Spiroarsoranes Exhibit Polytopal Equilibrium in Solution?



Tlahuextl Romero, Angela Margarita

2010

Tapia-Benavides Antonio R., Mendoza-Huizar Luis H., Pérez-García Francisco, Tlahuext Hugo , Alvarez Alejandro, Tlahuextl Margarita*, Do spiroarsoranes exhibit polytopal equilibrium in solution?, Inorganic Chemistry, 49, 1496-1502 (2010). American Chemical Society ISSN: 0020-1669. FEB 15 2010


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 andNMRstudies. NBO computations at theMP2/6-31þG(2d,2p) level indicate that methyl substitution in C2 or C3 of the oxazarsolane ring determines the predominance of ? or ? stereoisomers. GIAO B3LYP/6-311þþG(2d,2p) computations were used to assign experimental 1H and 13C NMR spectra.



Producto de Investigación




Artículos relacionados

Three-center intramolecular hydrogen bonding in oxamide derivatives. NMR and X-ray diffraction study

Acid-base equilibrium studies of 2-(aminomethyl)benzimidazolein aqueous solution

1 H, 13C, 15N, 2D and variable temperature NMR study of the role of hydrogen bonding in the structur...

Coordination chemistry of iminodiacetic esters. Structural and spectroscopic characterization of cop...

Diastereoselective alkylation of chiral glycinate derivatives containing the a-phenylethyl group.

SYNTHESIS OF NOVEL DINUCLEAR COMPLEXES OF Fe(O) DERIVED FROM 1,2-DICARBONYLIC MONOHYDRAZONES

Speciation of the new ligand di-isopropyliminodiacetoamide with Cu(II) using computational processin...

SYNTHESES, NMR STUDY AND STEREOCHEMISTRY OF NEW P-H TRICYCLOPHOSPHORANES

Structural studies of spiroarsoranes derived from 2-aminophenols

Synthesis and structural studies of new N-(p-toluenesulfonyl)amino acid o-phenolamides