Organic chem 1 test 1

2. Complete the table for the indicated compounds Molecule C2H2 SF5- NO3- Lewis structure include lone pairs & formal charges on each atom Resonance structures don't have to include lone pairs; write N/A if there are none Electron Geometry Hybridization on central atom Overlapping orbitals include value of n in the orbital name (e.g. 1s, not s). Write N/A if that kind of bond is not present in the molecule T: Molecular Geometry Bond angle(s) include < as necessary 3D structure and polarity don't have to include lone pairs; draw the |dipole arrow on the molecule or write "non- polar"

5. Redraw the following structures below in Lewis form, filling in all of the implied carbon atoms and hydrogen atoms. 6. The following are the reagent, intermediate, and product in a reaction you will learn later in Organic Chemistry. a. Identify any formal charges that are missing from the structures. b. Draw in all lone pairs. c. Redraw the structures with all hydrogen atoms. to t OH ₂

4. One of the resonance structures of "tropylium ion" (C7H7*) is shown below. It is planar and aromatic with Hückel number of p-n electrons where n=1. Draw all the other contributing resonance structures. (There are more than two.) Based on the “average" of the contributing resonance structures, how close does the average ring carbon get to its "octeť" in tropylium ion?

Four major contributing resonance structures are possible for the given cation, which is the intermediate o complex of an electrophilic aromatic substitution involving phenol and bromine. Two structures are given but are incomplete. Complete the given structures by adding nonbonding electrons and formal charges. Draw the remaining structures (in any order), including nonbonding electrons and formal charges. Complete structure A. Complete structure B. : 0 H :0- Br : Br

Please answer only question 3

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The following bonds in vinyl alcohol, what is the bond angles for C-O-H? See the structure as your basis. ... нн H-c=c-ö-H A) 109.5° B) 90° c) 180° D) 120°

8. a) State the hybridization (sp°, sp', sp) of each carbon in this molecule, going left to right. HC b) Write "most" under the most stable alkene. Write "least" under the least stable alkene. c) Write "most" under the most stable cation. Write "least" under the least stable cation. CH2 CH3 CH3 CH3 CH3 H3C CHT HC H3C ONLY roactions we have studied this semester.

5 please, if you can help with me with the  other one. thank

Electron Groups shape (EGs) 2. Total smallest 90° 120° 180° number angle of bonded atoms shape (B.P) + lone pairs (L.P) on smallest centre 90° 109° 120° angle atom Discuss with your neighbours and provide answers to the following questions. Circle the words that make each statement correct. 1) Each row represents different possible arrangements of that number of electron groups (EG). In each structure, the EGs get [ closer together / further apart ] and the angles between them get [smaller /larger ]. 2) The observed structures adopted by real molecules are those in the thick borders. These structure have the [ smallest / largest ] angles and the EGs are the [ closest together | furthest apart ]. 3) The preferred structure is adopted because this [ minimizes / maximizes ] the [ repulsion / attraction ] felt between all EGs. (Clue: what does VSEPR stand for?) 3.

Bond Angles in an Organic Molecule II The random letter labels in this diagram of allylcyanide are to be associated with the corresponding bond angle (or other property of the nearest atom). H H H dc H- a H b C=N Match the following (but do not select any individual letter more than once): CCC angle ~109.5° HCH angle ~120º CCC angle ~120° HCH angle ~109.5° bond angle ~180° 3. 3 3 •

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Part B: Models 1. For each chemical formula given, draw the Lewis structure of each isomer that approximates the actual shape and name following IUPAC rules. When requested, give the hybridization of every central atom. a) C4H10 (2 isomers) abioe onimA (d mol of ertio doss iw toss anistur b) C3H6CI2 (4 isomers)

Draw a valid Lewis (electron dot) structure of the following molecular formula. Note multiple structures (isomers) possible you only have to draw 1, but it must be valid (i.e. all atoms having the correct number of electrons). You must show how you arrived at the answer so I know it was not just copied from Google Images. You must show your work when tallying bonding electrons and how you get to the final structure to get credit! C2H3N

Oo.37. Subject  :- Chemistry

Just need the last two, Bond angle and 3D structure and polarity

7. Tropolone (A) is a molecule that easily loses a proton (H+) to form a relatively stable anion (B). In tropolone (A), the double and single bonds are clearly distinct from each other and their bond lengths very greatly (alternating long, short, long, etc.). However, in ion B, all of the carbon-carbon bonds are very similar. Explain. A OH +H- B

Please help wiith the fourth one (C3H8O)

Confused about this work sheet. Can I get some help to compare my answers?

Part G. Molecules with Oxygen and Nitrogen. Organic molecules often contain the elements oxygen and nitrogen. Construct a model with the molecular formula C5H12O where the oxygen is bonded to one hydrogen. When a hydrogen is bonded to an oxygen or nitrogen, you need to draw that bond in a bond-line structure. Draw the bond-line structure of this model. What is the molecular geometry of oxygen in your structure? Draw three more constitutional isomers with the molecular formula C5H12O where the oxygen is bonded to one hydrogen. Structure Structure Structure Draw three more constitutional isomers with the molecular formula C5H12O where the oxygen is bonded to two carbon atoms. Structure Structure Structure

If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the structure Y-X-Y could be abbreviated as XY,Z,. Classify each molecule according to its shape. Square pyramidal Linear Bent ( 129) Bent ( 109) Trigonal T-shaped See-saw Square planar pyramidal Answer Bank XY,Z2 XY,Z, XY,Z XY,Z; XY,Z XY,Z2 XY,Z XY,Z

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