Formation of extended 1D coordination polymers in tetrathioether complexes of mercury(II): Effect of the organic substituents on the crystal structures of {Si(CH2SR)4}HgBr2 (R=Me, Ph)

Bis(thioether)silanes: Synthesis and characterization of tin(IV) complexes with new dithioether ligands

“…Although their coordination chemistry is yet to be fully exploited, a number of transition and main group metal complexes thereof have been synthesized in recent years, including group 6 metal tricarbonyl derivatives (Tts R )M(CO) 3 (M ¼ Cr, Mo, W) [1,2] and polynuclear compounds of copper(I) [3,4] and bismuth(III) [5]. The syntheses of the tetradentate thioethers Si(CH 2 SR) 4 (R ¼ Me, Ph) and their mercury(II) derivatives {Si(CH 2 SR) 4 }HgBr 2 , both of which exhibit one-dimensional polymeric structures in the solid state, have also been reported [6]. We describe herein the preparation of the first two members of the related bis(thioether)silane family of ligands Me 2 Si(CH 2 SR) 2 (abbreviated Bts R , where R ¼ Me, Pr i ) and the synthesis and characterization of their corresponding tin(IV) tetrahalide derivatives (Bts R )SnX 4 (X ¼ Cl, Br).…”

Synthesis and reactivity of an 2-azabutadiene-based π-conjugated dithioether: Formation of a N,S-ligated molybdenum chelate complex and C,N,S-pincer complexes of palladium and platinum

“…In the context of our research on dithioether coordination chemistry [3][4][5], we were interested in functionalisation of 1 by thioether groups to assemble a polydentate ligand system possessing both sulphur and nitrogen donor sites [6].…”

“…Upon irradiation of Mo(CO) 6 in THF, first the adduct [Mo(CO) 5 THF] was prepared in situ, then the irradiation was continued in the presence of 2 until complete disappearance of the m(CO) vibrations due to [Mo (CO) 5 THF]. After work-up, a red solid was isolated, whose elemental analysis and IR data were consistent with formation of a chelate complex cis-[(OC) 4 Mo {(i-PrS) 2 C@C(H)-N@CPh 2 }] 3.…”

“…This terdentate bonding mode of 2 was furthermore evidenced by an X-ray diffraction study performed on a single crystal of C,N,S-[(i-PrS) 2 C@C(H)-N@C(Ph)C 6 H 4 )PtCl] 4b. 5 The quasi-square planar geometry around Pt (slight deformation of D 2d type symmetry) consists of two 5-membered platinacycles, which are annelated by a common Pt-N edge [Pt-N 1.990(3) Å ], and a chloro ligand in trans-position relative to the imine-N atom [N-PtCl = 177.03(9)°]. The root mean square deviation from the plane fitted through N-S(1)-Cl-Pt-C(5) amounts to 0.04 Å (mean of two independent molecules).…”

Reactivity of 4,4‐Dichloro‐1,1‐diphenyl‐2‐azabutadiene Towards Alkoxides and Thiolates: Synthesis of Functionalised π‐Conjugated 2‐Azabutadienes and Unexpected 1,4‐Thiazine Formation

“…[19] The presence of two reactive vinyl-chlorine bonds has been exploited for oxidative addition reactions of 1 across low-valent centres in order to synthesise σ-alkenyl complexes trans-[MCl{(C(Cl)=C(H)-N=CPh 2 )}(PPh 3 ) 2 ] (M = Pd, Pt) ligated by a π-conjugated organic array. [20] In the context of our research on dithioether coordination chemistry, [21][22][23] we were interested in the functionalisation of 1 with thioether groups in order to assemble a polydentate ligand system that potentially possesses both sulfur and nitrogen donor sites. With this objective, we treated 1 with various thiolates and present here the molecular structures of the resulting thioether-functionalised substitution products.…”