New Homodinuclear Alkyl and Aryl Dithiophosphonato Cd(II) and Hg(II) complexes: Syntheses and Characterizations

Abstract

New Cd(II) and Hg(II) complexes of five previously known dithiophosphonic acids ((p-MeO-C6H4)PS(SH)(OR), HL n , (n= 1-5); R= 3-pentyl-, HL 1 ; R=1-phenyl-1-propyl-, HL 2 ; R= 4-tertbutylbenzyl-, HL 3 ; R= diphenylmethyl-, HL 4 ; R= 4-tert-butylcyclohexyl-, HL 5 ) were prepared and characterized. To do this, the dithiophosphonic acids involved were treated with stoichiometric amount of the corresponding metal salts in methyl alcohol. The complexes came of as powdery crystals and were recrystallized from chloroform. The pure complexes were characterized by using elemental analyses as well as mass-(ESI), FTIR-, Raman-, NMR-( 1 H, 13 C, 31 P) spectroscopies.

The Syntheses and Characterization of New Dithiophosphonates derived from Novel 2,4-Bis(methoxytolyl)-1,3-dithia-2,4-diphosphetane 2,4- disulfides and Their Ni(II) Complexes

“…11 and 14.5 Hz, respectively. These values compare well with the literature reports for similar structures (19,20). Interestingly, the three-bond coupling of the phosphorus atom to C8 is not observable whereas, again, the three-bond coupling to C5 (7.4 Hz) and the four-bond coupling to C4 are (2.9 Hz).…”

“…In addition, the P-C two-and three-bond coupling constants can be put into order as; 3 JPC> 2 JPC. This observation has been reported in the literature for similar structures (19,20). No general trend was observed in the 13 C NMR spectral data of the complexes with respect to these ligands.…”

“…No general relation was observed between the 31 P chemical shifts of the complexes and of the ligands. All these values are in agreement with the literature(3,19,20).…”

“…[ The N-H stretching signal, v(N-H), observed in the spectra of the ammonium salts at 2945 and 2977 cm -1 disappears in the spectra of the complexes. IR data reported for similar compounds agree well with the signals (19)(20)(21)(22).…”

“…Dithiohosphonic acids, in particular, were reported to form complexes with transition metal cations like Ni(II), Cu(II), Zn(II), Cd(II), etc. (18,19). Among these, dithiohosphonato Ni(II) complexes possessing four-coordinate squareplanar geometry (20).…”