Internal diene compounds and their Pt complexes for catalyzed reactions including hydrosilylation

A complex according to Formula VIII, selected individually or in any mixture:

• wherein:
• the ligand 1CR2═CR3-E-X-E-CR4═CR5R is dienic,
• R1 and R6 are independently an alkyl or aryl group, or H if CR2—CR3 or CR4═CR5 is part of a cyclic monoolefin;
• R2, R3, R4, and R5 are independently H, an alkyl group, or an aryl group, or R2 and R3 and/or R4 and R5 taken together form part of a cyclic monoolefin structure;
• both occurrences of E are either SiR13R14 where R13 and R14 are independently alkyl or aryl, or CR15R16 where R15 and R16 are independently H, alkyl or aryl;
• X is selected from oxygen (O) and nitrogen (N), or X is a divalent hydrocarbyl group;
• L is a monodentate or bidentate neutral ligand selected from organophosphines, organophosphine oxides, CO, internal monoolefins, cyclodienes, or 2-methyl-1,4-naphthoquinone, and p=0-1;
• wherein, if p=1, the ratio min is 1:1;
• wherein, if p=0, the ratio min is from 2:1 to 3:2;
• wherein each said alkyl or aryl group either within the internal alkenyl group or on the organophosphine or organophosphine oxide independently contains 1-20 carbon atoms;
• wherein said alkyl or aryl group optionally and independently contains heteroatoms selected from N, O, P, Si, S;
• and
• wherein said alkyl or aryl group optionally and independently is substituted with halogen.