X-Ray and Spectroscopy Studies of Mercury (II) and Silver (I) Complexes of α-Ketostabilized Phosphorus Ylides

Abstract

The complexation behavior of the a-ketostabilized phosphorus ylides Ph <inf>3</inf>P=CHC(O) C<inf>6</inf>H<inf>4</inf>-X (X=Br, Ph) towards the transition metal ions mercury (II) and Silver (I) was investigated. The mercury(II) complex {HgX<inf>2</inf> [Y]} 2 (Y<inf>1</inf>=4-bromo benzoyl methylene triphenyl phosphorane; X=Cl(1), Br(2), I(3), Y<inf>2</inf>=4-phenyl benzoyl methylene triphenyl phosphorane; X=Cl(4), Br(5), I(6)) have been prepared from the reaction of Y<inf>1</inf> and Y<inf>2</inf> with HgX <inf>2</inf> (X=Cl, Br, I) respectively. Silver complexes [Ag(Y<inf>2</inf>) <inf>2</inf>] X(X=BF<inf>4</inf>(7), OTf(8)) of the a-keto-stabilized phosphorus ylides (Y<inf>2</inf>) were obtained by reacting this ylide with AgX (X=BF <inf>4</inf>, OTf) in Me<inf>2</inf>CO. The crystal structure of complexes (1) and (4) was discussed. These reactions led to binuclear complexes C-coordination of ylide and trans-like structure of complexes [Y<inf>1</inf>HgCl <inf>2</inf>]<inf>2</inf>. CHCl<inf>3</inf> (1) and [Y<inf>2</inf>HgCl <inf>2</inf>]<inf>2</inf> (4) is demonstrated by single crystal X-ray analyses. Not only all of complexes have been studied by IR, 1H and 31P NMR spectroscopy, but also complexes 1-3 have been characterized by 13CNMR.