Selenium and tellurium derivatives of a monocarbon platinacarbaborane complex †

Reactions of Schiff Base‐Substituted Diselenides and ‐tellurides with Ni(II), Pd(II) and Pt(II) Phosphine Complexes

“…For most of the structural parameters, a linear dependence with the size of the chalcogen or the size of the metal is observed along the series [M(L S )(PPh 3 )] – [M(L Se )(PPh 3 )] – [M(L Te )(PPh 3 )]. The Pd1–Te1 and Pt1–Te1 bonds of 2.4825(2) and 2.502(1) Å are similar to the shortest bond lengths reported in previous studies of palladium [ 21,25–29,34,36–38 ] and platinum [ 39–52 ] phenyltellurolato complexes. Remarkably and probably as a result of the strain in the five‐membered Te1–Ni1–N1 chelate ring, the Ni1–Te1 bond length in [Ni(L Te )(PPh 3 )] is only 2.4050(5) Å.…”

“…Selected bond lengths [Å] and angles (°) in the dichalcogenides {HL Y } 2 [30] and their nickel, palladium and platinum complexes [M(L Y )(PPh 3 )] (Y = Se, Te). [21,[25][26][27][28][29]34,[36][37][38] and platinum [39][40][41][42][43][44][45][46][47][48][49][50][51][52] [53] Ni(TeMes)Cp(PEt 3 ), [54] [W(CO) 5 -μ-(TePh)NiCp(PPh 3 )] [55] and [57] [(NiCpiPr 4 ) 2 -μ-( Te) 2 ] (2.44-2.45 Å), [58] [CpFe(C 5 H 4 )-Te(I) 2 -Ni(NHC)Cp] (2.4407(8) Å) [59] and (μ 4 -telluro)-hexakis(μ 3 -telluro)bis(μ 2 -bis(diphenylphosphino)methane)-bis(η 5 -tert-butylcyclopentadienyl)-pentanickeldiniobium (2.436(5) Å) [60] show the overall shortest Ni-Te bond lengths. (m/z = 538.0818) can be observed.…”

Trifluoromethylselenato(0) and trifluoromethyltellurato(0) complexes of platinum(II)

“…A complete set of the NMR data for all derivatives synthesized or detected is provided in Table 1 indicating good agreement with data reported for the sulphur derivatives [8,[15][16][17] and related PtSeR, e.g., [9,10,[18][19][20] and PtTeR compounds e.g. [19][20][21] as well as, with respect to the ECF 3 group, group 11 metallates [6,7]. In solution the existence of only one cis-and one trans-isomer is anticipated, while in the solid state ½PtðERÞ 2 ðPR 0 3 Þ 2 complexes could give rise to four possible isomers, cis/anti, cis/syn, trans/anti and trans/syn [9] (Scheme 1).…”

“…[29], to our knowledge the only example of a Pt-Te complex with the tellurium atoms in cis arrangement. [20]. Deviations of Pt-P bond lengths and angles measured and documented in the literature may be attributed to packing effects.…”

“…All data fall into the range of values obtained for related compounds, e.g. [9,10,18,20,[22][23][24][25][26] within limits of accuracy. While there are numerous platinum compounds with the structural element PtSeR (R = organic substituent) and phosphine ligands (see above) known, the number of tellurato-platinum compounds is limited [20,[27][28][29][30].…”