Solid state transformation of cis and trans methylcyclopentadienyl molybdenumdicarbonyltriphenylphosphineiodide on pelleting utilizing different diluents

Olalere G. Adeyemi, Umaru Salami

Department of Chemical Sciences, Redeemer’s University, Redemption City, Nigeria.

DOI: 10.4236/ojic.2012.22005                

Abstract

[(η⁵-C₅H₄Me)Mo(CO)₂PPh₃I] undergoes solid state transformation on the formation of a good pellet for FT IR measurement. There was a formation of the products mixture on pelleting using different diluents of group I metal salts on either the cis or the trans isomer of the [(η⁵-C₅H₄Me)Mo(CO)₂PPh₃I] complex. The cis or the trans isomer gave the same IR spectra i.e. a mixture of cis and trans isomer of the complex. It does not matter the isomer started with in the course of solid state transformation reaction, an equilibrium ratio of 30/70 (trans/cis) will still be achieved. The solid state IR spectra show very strong peaks at ν_co 1957, 1947 and strong peaks at 1867, 1853 cm^–1. The individual IR cis/trans isomer will therefore show at 1947 and 1853/1957 and 1867 cm^–1. The solution IR spectra gave, cis = 1961, 1875 and trans = 1963, 1882 cm^–1 in dry CHCl₃. Hence, most of the solid state IR measurement of the organometallic complex of the type (η⁵-C₅H₄Me)Mo(CO)₂(PPh₃)I on pelleting will give isomer mixture.

Keywords

Solid State; cis/trans-[(η⁵-C₅H₄Me)Mo(CO)₂PPh₃I]; Pelleting; Diluents; FT IR

Conflicts of Interest

The authors declare no conflicts of interest.

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