What is the best mass spectrometric technique for getting molecular
ion peak of a ruthenium terpyridine complex.

Hello ppm-ga,
I looked the web over and stumbled on an article from the Journal of
Organometallic Chemistry. The researchers found that electrospray
ionization mass spectrometry provided the most useful information for
them. The url of the article as a pdf is below:
http://nano.chem.emory.edu/~dlm/rods.pdf

Hope that helps the search terms I used to find the article was mass
spectra ruthenium terpyridine.

Hope that helps.
nealc-ga

Hello
 I hope you are still interested in ruthenium complexes.This sort of
data may still require you to do "oldfashioned" library work.
 The test methods used to characterize  the product under study, are
usually given at the end of the scientific paper.
 I was able to locate some researchers in ruthenium pyridine
complexes(Py4Ru).
Prof Mike Drew : www.chem.rdg.ac.uk/dept/staff/phys/mgbd.html#ruth
Prof Wayne E Jones:www.chem.binghamton.edu/JONES/jones.htm
 Prof Jones' site deals Ru polypyridyl complexes and the references at
the end of his article..
Prof K.E.Wieghardt:www.mpi_muelheim.mpg.de/str/staff/wieghardt_home_e.html.
  Prof K.E.Wieghardt's site deals with the synthesis and spectroscopic
characterization of Ru-Py.This may be of immediate
interest.to you.
Associate Prof of Chemistry Carol A Bessel:
www57.homepage.villanova.edu/carol
A paper on "Some unsymmetrical terpyridines and benzenic analogues" in
www.ch.ic.ac.uk/ectoc/echet98/pub/112/index.htm
 The above site also claims to have prepared the Ru analogues.
  Assembly of nanostructures by metal complexation of Bis(terpyridine)
ligands.--Debra Mohler. This title can be found in
www.organik.uni-erlangen.de/  
   You could be in contact with some of the Professors mentioned above
to obtain clarification to your question or the old fashioned
way.
Best Luck