The method of producing a linear C4 C19 aldehyde comprising reacting an anhydrous mixture comprising a C3 C18 olefin, CO and hydrogen in the presence of a catalyst at from about 100° to about 200° C. at a pressure of from about 500 psi to about 2500 psi and from between 0.5 to about 10 hours wherein said {HEAD ~ catalyst} has {TAIL ~ the following general formula}: 
has
The method of producing a linear C4 C19 aldehyde comprising reacting an anhydrous mixture comprising a C3 C18 olefin , CO and hydrogen in the presence of a catalyst at from about 100 ° to about 200 ° C. at a pressure of from about 500 psi to about 2500 psi and from between 0.5 to about 10 hours wherein said { HEAD ~ catalyst } has { TAIL ~ the following general formula } :
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