Added on: 0000-00-00 00:00:00Order Code: Question Task Id: 0
Internal Code: TV298
Chemistry Assignment Help:
Task:
a) Consider the IR spectra of each of the compounds in the spectral region 400-2000 cm-1 and answer the following questions:1
i) Identify 4 of the intense bands of the phenanthroline ligand; list the wavenumber of these bands for free phenanthroline and phenanthroline coordinated to CoII and CoIII.
phen [Co(phen)3] 2+ [Co(phen)3]3+
band 1
band 2
band 3
band 4
Are the vibrational bands of the phen ligand reasonably similar for the three cases?
Do the bands uniformly move to higher or lower wavenumber ?
ii) What do the observations in part i) imply about the bonding within the phen ligand in the coordinated and free forms? (Hint: if the spectra are similar then the bonding/local symmetry of the ligand is retained, if not then a significant change in bonding/symmetry is implied)
iii) Compare the changes in vibrational spectra of the phen ligand which result from conversion to the quinone. What has more effect on the bonding within the phen ligand, binding to the metal or conversion to the quinone?
iv) Identify the ?(CO) band of the quinone and the vibrational bands due to the anions (why is no anion vibration observed for [Co(phen)3]Br2?)
b) Preparation of resolved D(+)-tris(phen)cobalt(II) is achieved by precipitation with antimonyl-d-tartrate [in an analogous procedure to that given in step 3 (a)]. This reaction proceeds with QUANTITATIVE conversion of Co2+ to D(+)-tris(phen)cobalt(II). How is it possible to achieve a yield of >50% based on Co2+ (i.e. >100% optical yield) in this case?
c) The oxidation of D(+)-tris(1,10 phenanthroline)cobalt(II)antimonyl-d-tartrate by chlorine proceeds with retention of optical activity. Why does this infer that the cobalt(II) complex is in the solid-state when it is oxidised?
d) [Co(phen)3]2+ catalyses the racemisation of D-(+)[Co(phen)3]3+. Propose a mechanisim for this reaction.
Uploaded By : jack
Posted on : February 13th, 2018
Downloads : 0
Clients' Reviews about Our Services
Client ID 45637
U.S.A
Brilliant services. I ordered a 4 page essay and it was delivered in less than 24hours with every detail intact!
Client ID 45783
U.K
Aceassignment is the way to go. The writers are humble and patient with clients. I know this after using the website for about an year
Client ID 45214
U.K
My writer did a brilliant job. Not only did she delivered the paper on time and it was superb as my professor granted me an A without any criticism
Client ID 45009
CAD
I was running late with my assignment. I run into aceassignment on google, placed my order and within less than 18 hours my page essay was delivered. Thank you Aceassignment.
Client ID 45870
U.S.A
I've been using Aceassignment for about 2 years. My writer always delivers quality work. Mind you whenever I request for a revision it's always done ASAP and free of charge
Client ID 44218
U.S.A
At first, I was scared and hesitant about using this website. Didn't know if they would deliver, but they assured me they will. And for sure they did. I will definitely continue to use their service!
Client ID 45622
U.S.A
Easy to use website. You simply give your essay's instructions, make payment and before you known it the paper is delivered to you.
Client ID 43964
U.S.A
Unlike other platforms, this website is quite cheap and the quality is high. I have them manage my whole class and everything has been smooth this far.
Client ID 41996
U.K
Thanks for the excellent job. Swift and on the subject, just the way I like it. The Support team was quite nice to me, helped me with the order placing process.
Client ID 47654
AU
They are a marvel. I love their support team, they are so polite, it’s like speaking to a butler or something. Very pleasant people and good service of course.
Client ID 45670
FRA
Thank you for the help, I took my time and ordered a 14 days long essay. It came much earlier, around 7 days after I ordered it. Oh, and it was good, of course. I like the writer who did that, will definitely use again.
Client ID 22368
US
What I received was great. I forgot to mention in the instructions field that I needed reference page and by default, there was 0 in the number of references. I was surprised to see a full-fledged reference page in my paper with relevant citations. Bravo!
Client ID 46325
U.S.A
I was bombarding him with fine tuning and he handled it professionally. Thank you I will hire again the writer
Client ID 456820
U.S.A
Provided exceptional essay writing help in a short period of time. I plan to work with writer on many more projects!
Client ID 36890
UAE
Awesome paper in such a short amount of time. Was in a jam with another service who didn't deliver, but my writer did the job correctly. I will use her again to do my essays for sure!
Client ID 41427
U.K
Pretty good essay writer. I only made a couple of adjustments. She caught some instructions for the essay writing assignment that I didn't even notice, including them which was a pleasant surprise. Definitely recommend.
Client ID 45009
CAD
It was a very long paper, but the writer followed all the instructions, and she even finished the paper 5 days before the due date. Will write an essay with her again, thanks!
Client ID 36984
U.S.A
Writer was timely and proficient. I had to ask for a revision, but I got it back quickly with no other issues. Would use this essay writing service again.
Client ID 42960
CAD
Paper writing was prepared and submitted prior to the completed request date, and there were changes made quickly after I requested. This paper writer was accurate with numbers.
Client ID 31638
U.K
The first time I ordered here and it was a success. I received my order on time and according to my instructions. Thank you!
Client ID 46041
CAD
When I first discovered this website I was hesitant on whether they will deliver a plag free paper. The support team reassured me of their plagiarism policy. In deed they kept their word as the paper I got was authentic and plagiarism free.