Group 10 telluride and polytelluride complexes: Synthesis and structures of Pd(Te4)22− and (Ph3P)2Pt(μ-Te)2Pt(PPh3)2

Powerful Templating Effect in Rb/Pd/Sex Promoted by Crown Ether-like [Rb(Se8)]+ Coordination. Formation of Rb2[Pd(Se4)2]·Se8: A Layered Pd Polyselenide with “Encapsulated” Eight-Membered Selenium Rings

“…The bond lengths and angles in the Se 4 2- chains lie within the expected range (Table ) and are similar to values observed in other Se x 2- chains of known Pd polyselenides. − The Pd−Se(1)−Se(2) angle with 106.31(3)° is slightly higher than the Se−Se−Se angles within the chain.…”

“…In this respect the Pd polyselenide system is interesting because it is highly responsive to changes in countercations. For example, K 4 [Pd(Se 4 ) 2 ][Pd(Se 6 ) 2 ] (=K 2 PdSe 10 ), Cs 2 [Pd(Se 4 ) 2 ] (=Cs 2 PdSe 8 ), K 2 (enH 2 ) 2 [Pd(Se 4 ) 2 ·2Se 4 ], {(CH 3 )N(CH 2 CH 2 ) 3 N} 2 [Pd(Se 6 ) 2 ], (enH) 2 [Pd(Se 5 ) 2 ], (NEt 4 ) 5 [Pd(Se 4 ) 2 ·0.5Pd(Se 5 ) 2 ], and (Ph 4 P) 2 [Pd(Se 4 ) 2 ] all contain [Pd(Se x ) 2 ] frameworks which feature different architectures. The structural analysis of all compounds clearly shows a trend to form lower-dimensional structures with an increasing cation size, while the Pd atom always maintains a square-planar geometry.…”

Framework Bonding and Coordination Sphere Rearrangement in the M2X2Cores of Synthetic Analogues of Oxyhemocyanin and Related Cu and Pt Complexes

“…A structural database search reveals the existence of three analogous complexes of Cu or Ni with dichalcogenide bridges (X = S, Te) − with a structure of type 1a for which the corresponding 1b isomers are not known. Conversely, there are many compounds of the general formula [L 2 M(μ-X) 2 ML 2 ] (M = Rh(I), Ir(I), Pd(II), Pt(II), Au(III); X = Cl, Br, S, Se, Te) − which crystallize in structures of type 1b but whose 1a isomers are not known. In this contribution, we wish to take a qualitative, delocalized view of the bonding and electronic structures of these compounds in order to understand the existence of isomerism in the copper−oxygen compounds, the analogies and differences with other existing dichalcogenide-bridged compounds, and the influence of several structural parameters on the isomerization process.…”

Emerging trends in organotellurolate chemistry derived from platinoids

“…Cluster compounds like [PPh 4 ] 2 [Pd(Te 4 ) 2 ] were synthesized by reuxing the palladium precursor with tellurium powder. 148 This intriguing complex exists in two crystallographic forms: the a and b forms. The triclinic a and orthorhombic b forms were separated using ethylene diamine and ether solvents, respectively.…”

“…The triclinic a and orthorhombic b forms were separated using ethylene diamine and ether solvents, respectively. [148][149][150] Similarly, the complex [ 151 Contrary to the palladium precursors, the platinum analog resulted in the cluster complex [Pt 4 Te 4 (Te 3 ) 6 ] 4À , which was comprised of a Pt 4 Te 4 cubane core with a distorted octahedral conguration around the platinum atom. 152 Recently, several platinum group cluster complexes were isolated by reuxing TeCl 4 with the corresponding metal precursors.…”