Biochemistry 2280A Study Guide - Final Guide: Valence Bond Theory, Lone Pair, Sigma Bond

40 views11 pages

graymarten986

13 Mar 2018

School

Western University

Department

Biochemistry

Course

Biochemistry 2280A

Professor

Beth Mac Dougall- Shackleton

For unlimited access to Study Guides, a Grade+ subscription is required.

Document Summary

Predicts shape of molecule through focusing on electron pairs on valence shell of central atom. States that the pair of electrons (regions of electron density) position themselves to maximize the separation of pairs. Recall lone pairs take up slightly more space than bonded pairs. Ignore lone pairs when finding shape to memorize. Covalent bonds are formed by orbital overlap. Electrons in bonds are localized (restricted to area between the nuclei) Orbitals may hybridize in order to form bonds. Hybridization: atomic orbitals hybridize to create a new set of energy equivilant hybrid orbitals, which are lower in energy and therefore makes for a more stable molecule i. e. 1s + 2p orbitals 3sp2 orbitals. Sigma bond: formed by end on overlap (strong) Pi bond: formed by side on overlap (weak, can"t rotate- results in cis trans) *double bonds still count as one region of electron density when reffering to shape.

Related Questions

1. the XeO₂F₂ molecule polar or non-polar?

VSEPR theory predicts which arrangement of bonds and lone pairs of electrons about the central Xe atom in XeO₂F₂?

The XeO₂F₂ molecule can be said to use which type of Xe hybrid orbitals for sigma-bonding?

VSEPR theory predicts which molecular structure (arrangement of bonded atoms about the central Xe atom) for XeO₂F₂?
The XeO₂F₂ molecule displays approximately which bond angles (in degrees)about the central Xe

2. VSEPR theory predicts which arrangement of bonds and lone pairs of electrons about the central Se atom in SeF₆?

Is the SeF₆ molecule polar or non-polar?

VSEPR theory predicts which arrangement of bonds and lone pairs of electrons about the central Se atom in SeF₆?

The SeF₆ molecule can be said to use which type of Se hybrid orbitals for sigma-bonding?
The XeOF₂ molecule displays approximately which bond angles (in degrees)about the central Xe

VSEPR theory predicts which molecular structure (arrangement of bonded atoms about the central Xe atom) for XeOF₂?

Answer True or false for the following questions.

1) There are eleven Ï bonds in this molecule?

2) There are three lone pairs of electrons in the complete Lewisstructure?

3) The C-N bond is formed from overlap of an sp3 hybrid orbitalfrom the carbon atom with an sp2 hybrid orbital from the nitrogenatom?

4) An sp2 hybrid orbital on C-1 overlaps with an sp3 hybrid orbitalon C-2 to form the sigma bond between C-1 and C-2?

5) There are four Ï bonds in this molecule?

6)The C-2 and C-3 atoms cannot rotate about the internuclear axisbetween the two atoms since the Ï bond would break?

7) The Ï bond between C-3 and O is formed by overlap ofunhybridized p atomic orbitals?

Biochemistry 2280A Study Guide - Final Guide: Valence Bond Theory, Lone Pair, Sigma Bond

Document Summary

Get access

Related Documents

CHM136H1 Study Guide - Midterm Guide: Trigonal Planar Molecular Geometry, Valence Bond Theory, Trigonal Pyramidal Molecular Geometry

OCEAN 295 Lecture 3: VSEPR, Functional Groups, and Polarity

CHEM 001B Lecture Notes - Lecture 3: Valence Bond Theory, Orbital Hybridisation, Linus Pauling

Related Questions