Synthesis, spectroscopic and structural characterization of PdII and PtII complexes of the cyclic diselenoether 1,5-diselenacyclooctane, [8]aneSe2

Synthesis, Characterization and Coordination Chemistry of Some Selenium‐Containing Macrocyclic Schiff Bases

“…However, the highest recorded peak was found at m/z = 905, corresponding to [6 + Ϫ PF 6 ]. Similar observations have been reported by Reid et al, [14,17] The peak at m/z = 761 was assignable to [6 -2 PF 6 ]. The base peak at m/z = 434 corresponded to [(CH 2 ) 2 N=CH(C 6 H 4 )Se(C 6 H 4 ) CH=NCH 2 Pd].…”

“…[40][41][42] It is also comparable to the Pd-Se distances [2.4191(5), 2.4183(5) Å] in [PdL](PF 6 ) 2 (L = diselena macrocycle), [33] although shorter than the Pd-Se bond lengths of 2.428(1) Å and 2.435(2) Å in [Pd( [16]aneSe 4 )](PF 6 ) 2 ·2 MeCN. [14] The Se-Pd-N and N-Pd-Se angles are 93.3(2)°and 169.7(2)°, respectively, which implies that the complex has a distorted square-planar geometry. The Se···O distance 2.855 Å shows that selenium atom is weakly coordinated to the oxygen atom.…”

“…2+ (M = Pd or Pt), [14] [PtX 2 ([16]aneSe 4 )] + (X = Cl, Br), [15] [MX 2 ([16]aneSe 4 )] + (M = Rh or Ir), [16,17] [RuX 2 ([16]aneSe 4 )] n+ (n = 0 or 1), and [MX(PPh 3 )( [16]aneSe 4 …”

“…[10] Pinto and co-workers pioneered work on the synthesis of the cyclic selenium ligands. They have reported a series of selena crowns, including [14]aneSe 4 , [16]aneSe 4 , and [24]ane Se 4 . [11] The Pd II complex [Pd( [16]aneSe 4 )] 2+ has been shown to possess the c,c,c configuration by Pinto et al [12] They have also reported the complexes of Cu I and Cu II with [16]aneSe 4 and some new selenium-containing coronands.…”

Synthesis and Properties of Organometallic PtII and PtIV Complexes with Acyclic Selenoether and Telluroether Ligands and Selenoether Macrocycles

“…In our recent work on xylyl distibane complexes [11,12] several different conformations of the backbone were identified crystallographically, which serve to illustrate the effect of the backbone. The VT NMR spectroscopic data confirm cis-chelation in [PtMe 2 {o-C 6 H 4 (CH 2 SeMe) 2 [14] consistent with replacement of the chloro ligands with strong σ-donor Me groups which have a much greater trans influence and hence substantially reduce the Pt-Se coupling constants. 2 ] with ditelluroether in anhydrous Et 2 O both at room temperature and low temperature.…”