[arie]

Hi every one, I've a question regarding this equation:



Does anyone of you have the idea that what happen to the one Cl that disappear?

Thank you.

[Borek]

There is some inconsistency here. As far as I understand that's simple complexation, yet you start with Ru(III) and end with Ru(II). Or am I missing something?

[AWK]

Synthesis  proceeded in oil bath at 170-180 C. Organic compounds can be oxidized!

[arie]

Dear Borek,

That's exactly why this equation puzzles me.

But I did manage to synthesis the product. I've done characterization using IR, CHNS and EDX.

I just do not understand how the rxn happen. So far no answer for my question, although I did done a lot of info searching in journal and text book.

The synthesis process carry out by refluxing these two compound in DMF for 8 hours.

[arie]

Synthesis  proceeded in oil bath at 170-180 C. Organic compounds can be oxidized!

So can you explain in detail what may happened to the Cl that disappear?

Thank you.

[Borek]

Organic compounds can be oxidized!

Nobody suggested otherwise. But it usually means some change in their structure or at least they become charged. I can't see nothing like that here - is there some byproduct not listed, or should I buy new glasses?

[AWK]

Synthesis  proceeded in oil bath at 170-180 C. Organic compounds can be oxidized!

So can you explain in detail what may happened to the Cl that disappear?

Thank you.

HCl.
But you have DMF. It can hydrolyse to form formic acid and (CH3)2NH2Cl.
Since your synthesis is a redox reaction, at least part of bipyridil should be oxidized

[arie]

Dear Borek,
These are the procedures I went through to produce the product. I'm not sure whether got by-products, but AWK suggest the HCl,formic acid or (CH3)2NH2Cl formed.

I'll check again to see whether got these compound.

Dear AWK,
Thanks for your explanation. Actually my viva is on tomorrow. I'll try to understand your explanation and answer the question in case examiner test me.

By the way, do you have any references specially for this type of rxn?

Thank you! 

[AWK]

Original paper is published in Inorg. Chem. 1999, 38, 6298-6305

[arie]

Thank you. Unfortunately the library has closed. Anyway, thank you very much for your answer. you helped me a lot

[arie]

Hi, what analytical skills or spectroscopy i can use to determine the oxidation state of Ru is II?

[Sam (NG)]

You could measure the magnetic susceptibility of the starting material and the product (you know that the first is Ru (III)) using the Gouy Method, or you could use Electron Paramagnetic Resonance Spectroscopy.