Which statement is false? A sigma molecular orbital: O a. may result from overlap of p atomic orbitals perpendicular to the molecular axis (side-on) O b. may result from overlap of two s atomic orbitals. O c. may result from overlap of p atomic orbitals along the molecular axis (head-on) Od. may result from overlap of ones and one p atomic orbitals e. may be either bonding or antibonding

Consider acetyl salicylic acid, better known as aspirin. Its structure is (a) How many sigma and pi bonds are there in aspirin? (b) What are the approximate values of the angles marked (in blue) A, B, and C? (c) What is the hybridization of each atom marked (in red) 1, 2, and 3?

Explain what is wrong with each of the following statements. a. “A bond is a double bond. b. “A bond consists of four electrons, one in each of the four p orbitals involved in the bond. c. “A bond is twice as strong as a bond because it consists of two orbital overlaps insteadof just one.”

Which molecule below has a nonpolar bond in which the electrons are being shared equally? a.H2O b.NH3 c.Cl2 d.CH4

Consider the following flat drawing of methane (CH4) . a. What is HCH bond angle implied by this drawing if you assume it is flat? b. Are the electron domains of this flat CH4 spread out as much as possible? c. Use model materials to make a model of CH4 (methane). If you assembled it correctly, thefour bonds (bonding electron domains) of your model will be 109.5° apart. d. In which representation, the drawing above or the model in your hand (circle one) are theH’s of CH4 more spread out around the central carbon? e. Confirm that your model looks like the following drawing. The wedgebond represents a bond coming out of the page, and the dash bondrepresents a bond going into the page f. You will often see methane drawn as if it were flat (like on the previous page). Why is thismisleading, and what is left to the viewer’s imagination when looking at such a drawing?

Give the shape that describes each hybrid orbital set: (a) sp2 (b) sp3d (c) sp (d) sp3d2

Which statement/s is false about a sigma molecular orbital? A. May result from overlap of p atomic orbitals along the molecular axis. B. May result from overlap of p atomic orbitals perpendicular to the molecular axis. O. May result from overlap of two s atomic orbitals. O D. May result from overlap of one s and one p atomic orbitals. O E. All of the above.

Indicate the electron geometry (including electron domains) and hybridisation of the indicated atoms in the following molecule (NOTE: lone pairs are not explicitly shown).

Every atomic orbital, every molecular orbital has a particular name, such as s orbital, p orbital, d orbital, s orbital, p orbital, s* orbital, p* orbital, etc. a. What are the names of the atomic orbitals in 5d above? b.What is the name of the molecular orbital in 5f above

The C-N single bond (indicated by the highlighted portion) is a bond. It is formed from the overlap of orbitals on C with orbitals on N. Hint: Do not forget the implicit lone pair of electrons. sp hybrid sp2 hybrid sp3 hybrid sp3d hybrid pz unhybrid dxy unhybrid s unhybrid H sigma pi H. N С —н H. N. N Z-I