A tri-platinum complex containing a coordinatively naked platinum atom

Strong Closed-Shell Interactions in Inorganic Chemistry

“…In addition to infinite chains, there are d 8 dimers and oligomers, 361 for summaries, see ref 362. Tanase et al 363 A nice, half-bridged example with a short Pd II ‚‚‚Pd II distance of 288.6 pm is shown in Figure 25.…”

“…In addition to infinite chains, there are d 8 dimers and oligomers, for summaries, see ref . Tanase et al found an unbridged Pt−Pt−Pt linear trimer 30 with average Pt−Pt of only 264 pm, suggesting covalent bonding. The authors count the oxidation states as Pt I −Pt 0 −Pt I , not as Pt II −Pt II −Pt II .…”

Coordination Isomers of Trinuclear Pt2Hg Complex That Differ in Type of Metal–Metal Bond

“…Although the Hg atoms of Vicente’s Pt–Hg–Pt complexes are weakly coordinated by carboxylate (Hg–O = 2.714(4)–2.897(5) Å), the Hg atom of the present complex is not coordinated by any ligand except for the Pt atoms. The coordinatively naked Hg resembles a coordinatively naked Pt 0 in [Pt 3 (dppp) 2 (Me 2 C 6 H 3 CN) 2 ] 2+ . The Cl – is located at an axial position and the Pt–Cl distances are 2.538(2) and 2.554(2) Å, which are slightly elongated from the normal Pt–Cl distance, but similar to that of a Pt–Cl bond trans to a Pt–M bond owing to the trans influence of the Pt–M bond. − …”

Clusters [{Pt(diphosphine)(isocyanide)}2Pt]2+ Recharacterized as [{Pt(diphosphine)(isocyanide)}2Hg]2+

“…We have studied the electrochemical reduction of platinum and palladium complexes containing diphosphines and isocyanides, in which a new types of triplatinum complex having a naked platinum center, [{Pt(diphos)(RNC)} 2 Pt](PF 6 ) 2 , have been reported as the first examples of 40-electron triplatinum clusters, where diphos is cis -Ph 2 PCHCHPPh 2 (dppen) ( 13 ), Ph 2 P(CH 2 ) 3 PPh 2 (dppp) ( 14 ), or t Bu 2 P(CH 2 ) 2 P t Bu 2 (dtbpe) ( 15 ). − Recently, we considered that the clusters 13 − 15 may be incorrectly formulated and that they may have the formula [{Pt(diphos)(RNC)} 2 Hg](PF 6 ) 2 , on the basis of a new interpretation of their 31 P{ 1 H} NMR spectra. This suggestion is not inconsistent with our results of X-ray, EXAFS, and other spectroscopic analyses for 13 − 15 since platinum and mercury have similar atomic weights.…”