The synthesis of trans-1-n-hexyl-cis-2, 3-dideuterio cyclopropane and cis-1-n-hexyl-cis-2, 3- dideuterio cyclopropane are reported. These specifically deuterated cyclopropanes were reacted with tetrachloro (diethylene) diplatinum to yield the product (dichloro (2-n- hexylpropane-1, 3-diyl) platinum) of addition of Pt11 across the cyclopropyl C2C3 bond. It was shown by nmr spectroscopic analysis of the deuterated cyclopropanes and the ...