Sir, you are correct. But, I am interested in knowing how to convert solid dimer into vapor phase. Can you help me in knowing the actual procedure?  

Actually, for my experiment, Nitrosobenzene is the precursor for phenyl radicals where I want to carry out the kinetics with phenyl radicals in gas phase.

For this purpose, I want to know how to obtain nitrosobenzene either in gas phase or in liquid phase.

Sir,  will heating nitrosobenzene solve my problem?

Because from my basics, I think so with this low boiling point, heating under vacuum conditions may not be possible.

I know that nitrosobenzene is a very high vapor pressure.

So, is their any other way to do this conversion?

Sir, I am talking about the vapor pressure of nitrosobenzene. If the vapor pressure is too high, then all the nitrosobenzene will escape very fast.

I just want to know as to will nitrosobenzene exist in liquid phase at room temperature?

If not, then in which state of matter will it exist at room temperature?

Actually, I am talking about only in terms of the partial pressure of nitrosobenzene which is very high.

Okay sir, then if it is solid, then as you told that by heating under vacuum conditions it will go to vapor phase. I will try this out and hope that it will work out.

Thanks you Sir. 

This is a query within a query: 

I am not too sure if the initial statement from Parth that the "...The melting point of nitrosobenezne is more than its boiling point" is correct.  The boiling point is 58 C at 18 mmHg (i.e., reduced pressure). I could not gather data on the monomeric form.

On the generation of phenyl radicals, here is an excerpt from a paper : "A pulsed supersonic beam of phenyl radicals was generated via flash pyrolysis of the nitrosobenzene precursor in the primary source chamber at seeding fractions of less than 0.1% by operating a modified Chen source at 200 Hz."

http://www.chem.hawaii.edu/Bil301/Kaiser%20Paper/p184.pdf

Thanks for the paper.

I will go through this paper.

But I am just interested to know is there any simpler procedure to obtain nitrosobenzene in vapor phase.

I have no knowledge on this subject. 

Heating under reduced pressure, like Dr. Paech suggested, is what I'd perform too, but you will have to make sure that the vapors do not get sucked into the trap; and you will also simultaneously have to knock-off the -NO to generate the radical in situ.  (you really need a good vacuum here so as to make sure your radicals do not get quenched).

A simpler set up should involve a pressure tube and heating using a high energy UV lamp, but I do not know how you would measure anything (since you said you were going to perform kinetics).

Since you are at IITM, I am sure you have way more access to reactors / CVD / laser ablation equipment etc. You could refer to the paper and look for similar papers, get to know how people typically generate radicals using nitrosobenzene, and look around your campus to see who has similar equipments that you can access.

Best wishes!

Thanks for your info Sudarsan.

I will go through the paper and look around for more information there.

But, how actually did you knocked off the NO ?

Can you please tell me that. I would also want to know how much vacuum did u apply so that radicals dont get quenched?

@Parth:  Go through the paper and collect more information on how this is typically done. If I understand correctly, some of these require sophisticated equipment, which already operate at UHV conditions.

You will need to know what is expected of you in your experiment, how people typically carry out, and then figure out where you can run these within your campus. IITM is the best you can get in the city and you have all the resources you need right there in your campus. 

I agree with Dr. Paech.  Get the required ground work done and in doing that you will find answers to the many questions you have, and might also save a lot of time when you begin to run your experiments. The ground work will also help you ask the right questions when you find the right people within your campus.