Synthesis and structural characterization of three new platinum(IV) halide anions as triphenylcarbenium salts. Isolation from reaction of platinum tetrachloride with trityl chloride in benzene of a novel [Pt4(C6H4)2Cl14]2- anion containing o-phenylene ligands

Structures of the tetrafluoroborate salts of triphenylcarbenium ions with one and with two 4-methoxy substituents: stable carbocations

“…The aryl rings are twisted about 30 ° out of the central carbenium plane in each case, for unsubstituted triphenylcarbenium ions with a variety of counterions (Gomes de Mesquita, MacGiUavry & Eriks, 1965;Krebs & Paulat, 1979;Fenske, Kujanek & Dehnicke, 1983;Cook, Dahl & Dickerhoof, 1972) and for tris(4-aminophenyl)carbenium perchlorate (Koh & Eriks, 1971). A similar angle of twist has been estimated for the tris(4-methoxyphenyl)carbenium ion in a structure subject to considerable disorder (Andersen & Klewe, 1965).…”

Polymeric anionic networks using dibromine as a crosslinker; the preparation and crystal structure of [(C4H9)4N]2[Pt2Br10]·(Br2)7and [(C4H9)4N]2[PtBr4Cl2]·(Br2)6

“…The average terminal Pt-Br bond lengths are 2.455(2) Å and the bridging Pt-Br bonds are (2.496(2) and 2.517(2) Å). 16 To our knowledge, 1 contains the largest number of Br 2 molecules per formula unit in a structurally characterised compound.…”

Uncovering Multiple Metal–Metal Bonding in a Tetranuclear Fluoride Rhenium Cluster or the Curious Case of {[Ni(H2O)6](NH4)4}[Re4F18]·4H2O

“…In this complex, two Re(III) atoms are connected by µ–bridged fluorine ligand and the other two Re(III) atoms are connected by di‐µ‐fluorine ligands resulting in the formation of the tetranuclear‐core cluster anion. Metal clusters that adopt a similar structural motif are rare and include the o‐phenylenemetallated Pt 4 chlorides, [Mo 4 Cl 12 ] 3– clusters, [Zn 4 Cl 10 ] 2– , [Hg 4 I 10 ] 2– , [V 4 O 4 F 14 ] 6– , [Al 4 F 14 (O 2 C‐ t Bu) 2 ] 4–[20] and [M 4 Cl 18 ] 6– (M = Bi, Sb)…”