In the molecular orbital (MO) scheme for frontier orbitals of benzene, answer the following: a) how many of the carbons in benzene are sp2/p hybridized? b) how many p-n electrons does this system have? c) how many T,7* MOs can be constructed from the carbon p-orbitals? 2.

Draw an mo diagram for the valence electrons in C2. What is the bond order many sigma and pi bonds are there?  What is the HOMO(Highest Occupied Molecular Orbital) and LUMO(Lowest Unoccupied Molecular Orbital)? What is the magnetism of the species?

15. How many hybrid orbitals do we use to describe each molecule? Enter in integer form! -BrCN

I have read that PH5 does not exist and was wondering why.  Why can't the s orbitals from hydrogen form a bond with the five sp3d hybrid orbital from phosphorus?  I've also read that PH4 does exist.  Wouldn't the s orbitals on hydrogen form a bond with the sp3d hybrid orbitals there also with a free electron?

The percentage p-character in sp hybridized orbitals is a) 25% b) 50% c) 75% d) 66.67%

47) Combination of two p-atomic orbitals give two molecular orbitals. Show the possible two molecular orbitals for the two p-orbitals shown below (use the red lobe as shaded lobe, clearly indicate the node and the direction of increasing energy) +

2) a) Consider the following molecule . Given what you have learned about hybridization theory, draw an image or images explaining the bonding situation in this molecule. I want you to draw out all of the orbitals, hybrid orbitals and how they overlap to form the bonds in the molecule. Indicate the % s or p character in the given atomic and hybrid orbitals. Which C-C bond or bonds are the longest? In a paragraph or so explain the image or images you just drew. b) Lastly, consider the molecule below. Indicate the Molecular formula, the molar mass, label the hybridization of each atom except for hydrogen, indicate any chiral centers with a *, which bond or bonds are the shortest, identify by name of each functional group with an arrow pointing to the group.

a) Consider a molecule of acetone cyanohydrin, shown below. What is the hybridization and molecular geometry at CA, CB, and O?  (b) For Carbon B (CB) and nitrogen (N), draw orbital energy diagrams showing the orbitals involved in bonding after hybridization. Be sure to fill the orbitals appropriately with valence electrons. c) In your diagrams in part (b), which orbitals are involved in sigma and pi bonding?            Orbitals Involved in Sigma Bonding                                       Orbitals Involved in Pi Bonding  2p sp sp2 sp3 2p sp sp2 sp3 (d) In a sample containing many molecules of acetone cyanohydrin (and no other substances), what type(s) of intermolecular forces could be present? Choose all that apply. Covalent Bonds            Hydrogen Bonds              Dipole-Dipole Forces              London Dispersion Forces

4. Which set of hybridization states of C1, C2, and C3 of the following molecule is correct? (In order: C1, C2, C3) a.) sp2, sp2, sp2 b.) sp2, sp2, sp c.) sp3, sp2, sp d.) sp3, sp2, sp2 e.) sp2, sp, sp O || HỌ-C-CH=C=CH, C1 C2 C3

The molecule below has 10 o bonds. For Parts 1-4, determine the number of specified orbitals. H,C- -CH3