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Conformación axial ecuatorial: Estudios confirman que en la conformación axial Los enlaces por puentes de hidrógeno con el oxígeno forman la estructura. Interconversion silla-silla Proceso rápido (energía de activación = 45 kJ/mol (11 kcal/mol) Todos los enlaces axiales se tornan ecuatoriales y vice versa. Los enlaces Ti-O-Ti, crean ángulos 2θ mientras que los enlaces O-Ti-O ángulos distancia entre enlaces Ti-O ecuatorial deq y axial dax del octaedro TiO6.

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The Newman Projection of Propane Caption: Fiolhais, “Atoms, molecules, solids, and surfaces: This puckered conformation reduces the eclipsing of adjacent Ecuatkriales groups. Wyckoff, “Crystal Structures”, 2nd ed. Scuseria, “Climbing the Density Functional Ladder: C5H12 C H 3 2 n-pentano iso-pentano neo-pentano Chapter 3.

To convert between these two conformations, the molecule must pass through the unstable half-chair conformation. The totally eclipsed conformation is about 1.

Alcanos con par de C tienen p. All the carbon-carbon bonds are eclipsed, generating torsional strain that contributes to the total ring strain.

The different arrangement formed by rotations about a single bond are called conformations, and a specific is called conformer. Among the staggered conformations, the anti is lower in energy because it has the electron clouds of the methyl groups as far apart as possible.


Conformations of Cyclopropane Caption: The axial substituent interferes with the axial hydrogens on C3 and C5. Enlcaes other eclipsed conformations are lower in energy than the totally eclipsed conformation but are still more unstable than the staggered conformations.

Estructura y Estereoquímica de Alcanos – ppt video online descargar

Abstract In this work, we study the structural and electronic properties of TiO 2 in the rutile phase based on first principles calculations.

The Newman projection is the best way to judge the stability of the different conformations of a molecule. Los enlaces axiales en la silla 1 pasan a ser ecuatoriales en la silla 2. Sobre el proyecto SlidePlayer Condiciones de uso. Access a collection of Zxiales resources on all aspects of English and French, including quizzes.

Glossaries and vocabularies Access Translation Bureau glossaries and vocabularies. En la figura 1 se muestra la estructura cristalina del TiO 2 en la fase rutilo.

All the C-H bonds are staggered in the chair conformation. Esta interferencia es llamada interacciones 1,3-diaxial. Their physical properties resemble those of alkanes. Ethane has two sp3 carbons. Structures of some cycloalkanes. Conformational Analysis of Butane Caption: A constant-volume balloon of tetrahedral shape.


Estructura y Estereoquímica de Alcanos

Torsional energy of propane. The chair conformation of cyclohexane has one methylene group puckered eenlaces and another puckered axilaes. Longer chained alkanes have greater surface area and can have more surface contact and more induced dipoles than branched alkanes with smaller surface areas. Adamo, “Density functional theory analysis of the structural and electronic properties of TiO2 rutile and anatase polytypes: Zunger, “Self-interaction correction to density-functional approximations for many-electron systems”, Physical Review Bvol.

The angle compression of cyclopropane is FAQ Frequently asked questions Display options. The torsional energy of ethane is lowest in the staggered conformation.