“…Examples include ylide complexes of Pd(II) [4], Pt(II) [5], Rh(I) [6], Ti(IV), Zr(IV), Hf(IV) [7], Cu(II) [8], Hg(II) [9], W(0) [10], Ag(I) [11], Au(I), Au(II) and Au(III) [12]. In addition, phosphonium salt [13] and metalate [14] formations often interfere in their reactions with hydrated metal salts. The monoketo ylides and C,C-disubstituted ylides differ in their reactivity towards metal derivatives, for e.g., O-coordination of the monoketo ylide was observed with trimethyltin chloride [15], whereas the reaction of Ph 3 PC(COCH 3 )(COPh) (ABPPY) with the same tin substrate did not yield the direct complexation product but led to decomposition to [17].…”