1 Aromatic 1H-[1,2]Diphosphole with a Planar Tricoordinated Phosphorus, plus  2 -Coordination mode between Ruthenium(0) and a Phosphaalkene. Alex S. Ionkin*, William J. Marshall, Brian M. Fish, Matthew F. Schiffhauer, Fredric Davidson, Charles N. McEwen, Dalen E. Keys H1 and C13 Assignments and some coupling constants(CP and HP) For an  2 -Coordination between Ruthenium(0) and a Phosphaalkene Complex 27 Purpose of this study: The purpose of this study was to assign the proton and carbon chemical shift and some of the CP and CH coupling constants to verify the structure shown below. The x-ray already established its structure in the solid state, but does it stay that way in solution? Experimental: All the spectra, H1, C13, C13 Dept135, Cosy 45, Tocsy, HMQC and HMBC were run on a Bruker500 AMX using a inverse broadband probe at 50 o C in Toluene-d8 and the parameters used in these experiment are given in Figures 1-7. All the experiments run on this sample used the pulse sequences found in the Bruker pulse sequence library and their names are listed on the spectra. Ru OC P N P CO N C H 2 CH 2 CH 2 CH H 2 C C H 2 C C H 2 H 2 C H 1 2 3 4 5 6 7 8 9 10 A B C D E