Concept explainers
Interpretation:
The four different concepts are given in the
Concept Introduction:
Valance bond (VBT) theory:
Hybridization: When the atomic orbitals mix to form new atomic orbitals, the new orbitals have the same total electron capacity as the old ones. The properties and energies of the new, hybridized orbitals are an 'average' of the original unhybridized orbitals.
Valence shell electron pair repulsion (VSEPR) theory: It is a model used in chemistry to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms.
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Chemistry & Chemical Reactivity
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- Consider the reaction BF3 + NH3 -> F3B-NH3 (a) Describe the changes in hybridization of the B and N atoms as a result of this reaction. (b) Describe the shapes of all the reactant molecules with their bond angles. (c) Draw the overall shape of the product molecule and identify the bond angles around B and N atoms. (d) What is the name of the bond between B and N. (e)Describe the bonding orbitals that make the B and F, B and N & N and H bonds in the product molecule.arrow_forwardA useful solvent that will dissolve salts as well as organic compounds is the compound acetonitrile, H3CCN. It is present in paint strippers.(a) Write the Lewis structure for acetonitrile, and indicate the direction of the dipole moment in the molecule.(b) Identify the hybrid orbitals used by the carbon atoms in the molecule to form σ bonds.(c) Describe the atomic orbitals that form the π bonds in the molecule. Note that it is not necessary to hybridize the nitrogen atom.arrow_forwardIf an electron is removed from a fluorine molecule, an F+2molecular ion forms.(a) Give the molecular electron configurations for F2 and F+2 (for the MOs constructed from valence AOs).(b) Give the bond order of each species.(c) Predict which species should be paramagnetic.(d) Predict which species has the greater bond dissociation energy.arrow_forward
- (a) What is the hybridization of chlorine in Clo4 ? (Type your answer using the format sp3 for sp3.) (b) What is the hybridization of bromine in BrF5? (c) What is the hybridization of bromine in BrO2 ?arrow_forwardThe lactic acid molecule, CH3CH(OH)COOH, gives sourmilk its unpleasant, sour taste. (a) Draw the Lewis structurefor the molecule, assuming that carbon always forms fourbonds in its stable compounds. (b) How many π and howmany σ bonds are in the molecule? (c) Which CO bond isshortest in the molecule? (d) What is the hybridization ofatomic orbitals around the carbon atom associated withthat short bond? (e) What are the approximate bond anglesaround each carbon atom in the molecule?arrow_forwardFor each of the following molecule: (i) draw the correct Lewis structure; (ii) determine the molecular geometry and the type of hybridization on the central atom, and (iii) predict whether the molecule is polar or nonpolar. (a) BrCl5arrow_forward
- The molecular orbitals depicted below are derived from 2p atomic orbitals in F₂⁺. (a) Give the orbital designations. (b) Which is occupied by at least one electron in F₂⁺? (c) Which is occupied by only one electron in F₂⁺?arrow_forwardDraw the molecular orbital energy diagrams for the valence electrons in the following diatomic molecules. Calculate the bond order and indicate if each of them is diamagnetic or paramagnetic. (а) В> (b) С. (c) CO (d) NO (е) Оzarrow_forwardValence bond theory The skeletal structure for methyleneimine (CH₂NH) is shown. Draw for yourself the best Lewis structure. Propose a bonding scheme by indicating the hybridization of the central atoms and the orbital overlaps for each bond. (a) H one (b) H-C-N-H The bond labeled (a) forms from The bond labeled (b) forms from: ● one o-overlap of a C (c) π-overlap (s) of a C -overlap of a C sp2 orbital and a N orbital and a N orbital and a H 1s The ideal bond angle <(C-N-H) around the N atom is orbital, and orbital. The bond labeled (c) forms from O - overlap of a N There is/are one lone pair(s) around the N atom. Lewis structures do not attempt to portray 3D shape, but you can predict the molecular geometry from VSEPR theory. The ideal bond angle <(H-C-H) around the C atom is 120 orbital and a H 1s degrees. orbital. degrees. orbital.arrow_forward
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