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This study resource was shared via CourseHero.com HW-1 Dr. Shabbir OChem-320M/328M Due 06/06/17 2 Q1-Use your knowledge of functional groups and formal charges and draw Lewis structures for the following condensed molecular formulas. Draw all the lone pairs and formal charges.

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Please Print the first three alphabets of your last name in the three boxes Reminders: In order to get a grade for your HW You must have ALL your answers written in permanent ink You must STAPLE all your HW pages together You must submit your HW on-time (By 8:30am) This study resource was shared via CourseHero.com HW-1 Dr. Shabbir OChem-320M/328M Due 06/06/17 2 Q1-Use your knowledge of functional groups and formal charges and draw Lewis structures for the following condensed molecular formulas. Draw all the lone pairs and formal charges. Q2- Add lone pair of electrons where necessary to complete the valence shell of atoms in these molecules. Then assign formal charges where appropriate? A) (CH3)2CHCH2CHO D E) CH3COOCH2CH3 ) NH2NH2 B) CH2O C) (CH3)4N+ F) CH3CON(CH3)2 C H H C H O O C H H C H C H H H H C O H N C H H H H C H H N H C C H H C H A) B) C) D) E) C H H O H H H H H H H H H C C C C C C C H H H H H H H F) https://www.coursehero.com/file/23882449/HW-1/ This study resource was shared via CourseHero.com HW-1 Dr. Shabbir OChem-320M/328M Due 06/06/17 3 Q3- For the following molecules use this symbol to indicate the direction of bond dipole of all polar bonds. If the molecule that have an over all dipole moment use an additional sign to indicate the molecular dipole moment in the dotted box on the left side of the molecule. Q4- In most amines the nitrogen atom is sp3 hybridized with a pyramidal structure and a bond angle of 109°. However, in formamide the nitrogen atom is planar with a bond angle close to 120°. Draw resonance structures for formamide and explain with words why this unexpected bond angle occurs. C H H Cl H F B F F N H H H C H F F F C C CN NC CN NC A) B) C) D) E F) C C N H H H Cl H3C C CH3 O G) H) I) C N H H H Consider CN (cyano group) as a whole electronwithdrawing H C N O H H formamide https://www.coursehero.com/file/23882449/HW-1/ This study resource was shared via CourseHero.com HW-1 Dr. Shabbir OChem-320M/328M Due 06/06/17 4 Q5- Circle the functional group of each compound in the following structure. In the box state to which class of compound the structure belongs to. Also indicate 1o , 2o or 3o where applicable. Do not circle or label carbon-carbon double bonds (alkenes). Q6- Below draw the π* antibonding molecular orbital of a carbon-carbon double bond. In the dotted box write the number of nodes present in the π* molecular orbital. O COOH CHO O O O NH O O CH3 OH H N https://www.coursehero.com/file/23882449/HW-1/ This study resource was shared via CourseHero.com HW-1 Dr. Shabbir OChem-320M/328M Due 06/06/17 5 Q7-Draw the next best contributing structure of each molecule in the space provided. For the structure on the left, use arrows to indicate the movement of the electrons. Finally, if one of the two contributing structures is the major contributing structure draw a circle around the major contributor. C C O C C C C C H H H H O C O C H H H C C O H H H H H3C N C H3C C H H H H H H H H C C C H3C H O https://www.coursehero.com/file/23882449/HW-1/ This study resource was shared via CourseHero.com HW-1 Dr. Shabbir OChem-320M/328M Due 06/06/17 6 Q8- The following molecule are best described as the hybrid of three contributing structures. Draw the second and the third contributing structure included all the formal charges and lone pairs. Use arrows to show the movement of the electrons to give the structure you drew. H3C C O C C O CH3 N C N H H H H N H H https://www.coursehero.com/file/23882449/HW-1/ This study resource was shared via CourseHero.com HW-1 Dr. Shabbir OChem-320M/328M Due 06/06/17 7 Q9-For the following molecules write the hybridization state of all the C, N and O atom in each molecules. Remember resonance effects hybridization. H C C CH2 H O H CH3 CH3 CH2 C H O C C C C C H C H H2 C H H H N CH3 CH3 A) B) C) D) O C C O N C CH2 H H2C O E) F) C H2 CH2 C H C C C H O N CH3 CH3 https://www.coursehero.com/file/23882449/HW-1/ This study resource was shared via CourseHero.com HW-1 Dr. Shabbir OChem-320M/328M Due 06/06/17 8 Q10- Describe each bond indicated with an arrow as the overlap of orbitals. For example an answer might be σCsp3 -Csp3 Q11- Many naturally occurring compounds contain more than one functional group. Circle all the functional groups in the following compounds. You may circle the same group twice on the same molecule. C C N C C C HC N CH2 C H2C H3C H H H H H H σ π σ π σ σ Nicotine H2C C O N H C N O S CH3 CH3 COOH Penicillin G Naturally occuring antibiotic HO HO NH2 Dopamine Neurotransmitter that is deficient in Parkinson’s disease O HO I I COOH NH2 Thyroxine thyroid hormone OH O Testrosterone Male sex hormone I I https://www.coursehero.com/file/23882449/HW-1/ This study resource was shared v

 
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