Draw all resonance contributors for each of the following molecules or ions. Be sure to include the curved arrows that indicate which pairs of electrons are shifted in going from one resonance structure to the next. (a) CH3NO2 (b) CH, CO, (c) CH CHCHCH2 (the ion has two C-C single bonds) (d) C5H5N (a ring is formed by the C and N atoms, and each H is bonded to a C atom) (e) C4H5N (a ring is formed by the C and N atoms, and the N is bonded to one H atom, and each C atom is bonded to one H atom)

Using just a periodic table (not a table of electronegativities), decide which of these is likely to be the most polar bond. Explain your answer! (a) C-F (b) S-F (c) Si-F (d) O-F

Which of the following are not related as resonance structures? OH (A) `NH. NH (B) ОН (C) CH2 (D)

Draw Lewis structures for the following molecules. Include all lone pairs and H atoms. (a) OH (b) CI CI (c) (d) (e) (f) (g) (h) (i) H3N

Finish the following questions. ((a) Draw all of the possible Lewis structures (including reasonance structures) of the following compounds.(b) Label the formal charge for each atom.(c) Determine which resonance structure(s) is(are) the better/best and briefly explain. ClO2F2+

Draw a Lewis structure for each of the following molecules: (a) chlorodifluoromethane, CHClF2 (b) propanoic acid, C2 H5CO2H (basic structure pictured below) (c) acetonitrile, CH3CH (the framework is H3C-C-N) (d) allene, H3CCCH2

Draw a Lewis structure for each of the following                                        molecule:                                                     (a) chlorodifluoromethane, CHCIF2                                                               (b) propanoic acid C2H5CO2H (basic structure                                                  pictured below)                                                                                                                                                                                                                                                                                                                                                                                                                                                              (c) acetonitrile, CH3CN ( the framework is H3C-C-N)                                     (d) allene, H2CCCH2

Consider compounds A–D, which contain both a heteroatom and a double bond. (a) For which compounds are no additional Lewis structures possible? (b) When two or more Lewis structures can be drawn, draw all additional resonance structures.

Which two species have the same number of lone electron pairs in their Lewis structures?(a) H2O and H3O+(b) NH3 and H3O+(c) NH3 and CH4(d) NH3 and NH4+

CHEM 1P92 Assignment 12B (Liquids, Solids, and Intermolecular Forces). Version # 177 1. Draw Lewis structures for the following compounds. Remember to enclose ions in square brackets. On your answer sheet, state the number of valence electrons in each compound. (a) CH 3 I (b) CaCl 2 (c) Mg(NO3)2