Search found 11 matches

by terdaf
Sat Mar 18, 2017 5:18 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: chapter 3 question 9
Replies: 1
Views: 542

chapter 3 question 9

In ex 9 of chapter 3 in the organic chemistry book it shows a fluoropentane and asks for the unfavorable interactions present. The answer is steric and torsional strain. Could someone explain exactly where and how each is present in this specific molecule?
by terdaf
Tue Mar 14, 2017 8:20 pm
Forum: *Cycloalkanes
Topic: Numbering counterclockwise or clockwise
Replies: 4
Views: 2342

Numbering counterclockwise or clockwise

Is the numbering in cycloalkanes (and cycloalkenes for that matter) clockwise or counterclockwise? Ive read that it doesnt matter and to go with whatever of the two provides the lowest numbers (I think there was some exercise where both ways were used in different subquestions) but in page 102 of th...
by terdaf
Tue Mar 07, 2017 6:48 pm
Forum: *Cycloalkanes
Topic: course reader page 96 neo and tert
Replies: 3
Views: 505

course reader page 96 neo and tert

Can someone explain why we use -tert- instead of -neo- in the example for 2 substituents on ring on page 96 of course reader? Arent three CH3s attached to a C described by the "neo" structure?
by terdaf
Mon Mar 06, 2017 9:52 pm
Forum: *Organic Reaction Mechanisms in General
Topic: 14A subjects
Replies: 1
Views: 327

14A subjects

Hi can anyone suggest the pages/exact topics from the book I need to revise from 14A? I took 14A a year ago and need to refresh the topics needed for organic chemistry?
by terdaf
Wed Feb 22, 2017 1:29 pm
Forum: Second Order Reactions
Topic: Quiz 2 Practice Question 7
Replies: 3
Views: 442

Re: Quiz 2 Practice Question 7

couldnt we set Δt = 22.0 min, Δ[Α] = 0.622-0.773 M, n = 1 (it says it is first order) and [A] = 0.773 (initial concentration) in the differential rate law and solve for k?
by terdaf
Tue Feb 21, 2017 7:56 pm
Forum: Second Order Reactions
Topic: Quiz 2 Practice Question 7
Replies: 3
Views: 442

Quiz 2 Practice Question 7

I know how we solve thi sproblem using second order integrated rate law, but I was wondering how we could use the second order differential rate law to solve it and why wouldn't we (I tried and I got a different answer than the right one).
by terdaf
Tue Feb 14, 2017 1:35 am
Forum: Balancing Redox Reactions
Topic: Chapter 14 Question 15
Replies: 1
Views: 274

Chapter 14 Question 15

In part (a) how do we determine the oxidation and reduction half-reactions? I am confused on when we consider and write the whole entity (here AgBr(s) ) or part of it ( Ag (s) )

In part (b), if someone could walk me through the derivation of half-reactions as well?
by terdaf
Tue Feb 14, 2017 1:29 am
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Ka / Midterm 2014 Q8
Replies: 1
Views: 247

Ka / Midterm 2014 Q8

Can someone help me understand / remind me the concept of Ka ? In the question it states "Calculate the value of Ka for HF
by terdaf
Mon Jan 30, 2017 4:45 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: ATP and endothermic/exothermic
Replies: 1
Views: 454

ATP and endothermic/exothermic

Breaking bonds are endothermic reactions, sine they require heat. Forming bonds are exothermic reactions, since they release heat. What confuses me is the coherence of the above statements with the fact that ATP is used to release energy by breaking the bond between the third phosphate and the rest ...
by terdaf
Sat Oct 24, 2015 5:07 pm
Forum: Resonance Structures
Topic: Resonance hybrid of nitryl chloride
Replies: 1
Views: 329

Resonance hybrid of nitryl chloride

In ClNO2 resonance structures, does N contribute both electrons for the single covelent bond with one oxygen atom? Why doesn't the Lews structure include two double N=O bonds, wouldn't it be more stable/lower in energy (non-resonance structure)?

(from Exercise 3.45)
by terdaf
Sat Oct 24, 2015 4:59 pm
Forum: Lewis Structures
Topic: hypobromite ion Lewis structure
Replies: 1
Views: 818

hypobromite ion Lewis structure

In constructing the Lewis structure of hypobromite ion [BrO]-, why is there a lone pair (Br has three lone pairs, O has 3 lone pairs) instead of a double bond (with Br having 3 lone pairs and O having 2 lone pairs)? Given we are looking for the lowest energy possible, aren't lone pairs higher in ene...

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