Platin(II)-Komplexe mit schwefelfunktionalisierten Alkenylliganden

Formation of multifunctional ligands by nucleophilic addition of alcohols and thiols to the alkyne groups in compound C5H5FeC5H4CCSCCH: Reactivity studies

“…This fact seems to be as a result of the contribution of the electron lone pairs on the sulfur and oxygen atoms. Similar values are found in compound trans-[Pt{(E)-C(SMe)@CHPh}Cl(PEt 3 ) 2 ]ÁCHCl 3 [1.766(6) Å] [11] and [HOs 3 (CO) 10 (l-g 1 :g 2 -PhCH 2 C@CH-C@CH-O)] [1.400 (12) Å] [12]. The C(2)-S(2)-C(3) angle [101.1(2)] is comparable to those found for the compounds FcC"CSC"CSiMe 3 [99.…”

“…According to the mechanisms described for these authors, we agree that once the complex [{Co 2 (CO) 6 } 2 (l-g 2 :g 2 -FcCCSCCH)] is formed, it can react with a molecule of the alkyne [{Co 2 (CO) 6 }(l-g 2 -FcCCSC"CH)] followed by another molecule of the ferrocenyl alkyne [{Co 2 (CO) 6 }(l-g 2 -FcC"CSCCH)] to give the trimerization product [{Co 2 (CO) 6 } 3 -(l-g 2 -FcCCS) 2 (l-g 2 -HCCS)]C 6 H 2 Fc after demetallation. Its spectroscopic and spectrometric data are the following: IR (m CO 2092m, 2061 s, 2030 vs), 1 H NMR {7.19 (s, 2H, C 6 H 2 ), 6.77 (s, 1H, HC"C), 4.54-4.36 (m, 12H, C 5 H 4 ), 4.34 (s, 5H, C 5 H 5 ), 4.31 (s, 5H, C 5 H 5 ), 4.20 (s, 5H, C 5 H 5 }, MS(ESI + ) m/z: 1488-1152 (M + ÀnCO, n = [6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Organophosphines in Cis-PtP2CCl Derivatives Structural Aspects

“…Cis-Pt(η 1 -PL) 2 (η 1 -CL)(η In seventeen examples, only monodentate ligands form cis-configurations with an inner coordination sphere of PtP 2 CCl type. These are mostly colorless or yellow, and crystallize in three crystal systems: triclinic (3), orthorhombic (5) and monoclinic (9) [11,12] [20], and [Pt{P(η 2 -C 7 H 5 NO)Ph} 2 (Me)(Cl)]Pr i OH [21]. The structure of [Pt(PPh 3 ) 2 {η 1 -C 8 H 12 N 2 }(Cl)] + [17] is shown in Figure 1 as an example.…”

“…There are over forty such complexes which crystallize in four crystal systems: tetragonal (3), triclinic (6), orthorhombic (9) and monoclinic (24) examples. The structures are arranged in the order of increasing number of atoms in the respective metallocycle.…”

Reactivity of silyl-substituted heterobimetallic iron–platinum hydride complexes towards unsaturated molecules: Part II. Insertion of trifluoropropyne and hexafluorobutyne into the platinum–hydride bond

“…A free-radical participation has been ascertained by ESR experiments in the presence of free-radical initiators. More recently, Steinborn has evidenced that reaction of MeS-C"C-Ph with trans-[(PEt 3 )PtH(Cl)] both in benzene and methanol leads exclusively to cis-[(PEt 3 )PtCl{E-(SMe)C@ C(H)Ph}] [20]. Since addition of radical inhibitors had no influence on the outcome of the reaction course, oxidative addition of MeS-C"C-Ph leading to a Pt(IV) alkynyl species, subsequent 1,3 hydride shift and finally migration of a MeS ligand along a vinylidene intermediate have been proposed.…”