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- Show the structures of methane CH4; formaldehyde, CH2=O and acetylene, C2H2 exhibiting the formation of s-Bonds and p-Bonds, type of hybridization andoverlapping of orbitals. How many s-Bonds and p-Bonds are there in each of the three molecules?Write simple valence bond wave functions for formationof bonds between C and H atoms. What C-H compounddoes the VB model predict? What geometry does it predictfor the molecules?The drawing below shows the overlap of two hybrid orbitalsto form a bond in a hydrocarbon. (a) Which of the followingtypes of bonds is being formed: (i) C¬C σ, (ii) C¬C π,or (iii) C¬H σ? (b) Which of the following could be theidentity of the hydrocarbon: (i) CH4, (ii) C2H6, (iii) C2H4, or(iv) C2H2?
- The diagram that follows shows the highest-energy occupiedMOs of a neutral molecule CX, where element X is in thesame row of the periodic table as C. (a) Based on the numberof electrons, can you determine the identity of X? (b) Wouldthe molecule be diamagnetic or paramagnetic? (c) Considerthe p2p MOs of the molecule. Would you expect them to havea greater atomic orbital contribution from C, have a greateratomic orbital contribution from X, or be an equal mixtureof atomic orbitals from the two atoms?12. Give the absolute configurations of the following two molecules.14. How many sigma bonds and pi bonds are there in each of the following molecules? a. H Cl---C----Cl H b. H Cl C=C H H c. H H3C---C=C---C=C---H H
- Because the structure of a tetrahedrom molecule uses 3 dimensions, a tetrahedron has a bond angle of 109.5 instead of the expected 90 degrees. True or False?The N atom in CH3CONH2 (acetamide) is sp2 hybridized, even though it is surrounded by four groups. Using this information, draw a diagram that shows the orbitals used by the atoms in the – CONH2 portion of acetamide, and offer an explanation as to the observed hybridization.How many sigma and hoe many pi bonds are there in one molecule of 3,3-dimethylpentane?
- Give the type hybridization and identify the atomic molecular orbital attached to each of the carbon atoms in the given molecule. 1. HC ≡ C − C ≡ CH 2. H2C = C = C = CH2 Please explain in detail and write legibly thanks(a) Predict the electron-domain geometry around the centralXe atom in XeF2, XeF4, and XeF6. (b) The molecule IF7has a pentagonal bipyramid structure: five fluorines areequatorial, forming a flat pentagon around the central iodineatom, and the other two fluorines are axial. Predictthe molecular geometry of IF6-.The structure of the visual pigment retinal is shown in (1). Label each atom with its state of hybridization and specify the composition of each of the different type of bond.