A reinvestigation of o-phenylenemercurials

Crown compounds for anions. Sandwich complexes of cyclic trimeric perfluoro-o-phenylenemercury with hexacyanoferrate(III) and nitroprusside anions

“…3.316 (8) Fe (1) (1) 2.064 (7) Fe(1)-N(4) 1.666(17) Hg(1)-C (14) 2.084 (7) N(4)-O(1) 1.11(2) Hg(2)-C (2) 2.087 (7) C(19)-N(1) 1.148(9) Hg(2)-C (7) 2.085 ( (7) 173.7(3) a Symmetry transformation Àx þ 1; Ày; Àz þ 2 was used in order to generate equivalent atoms.…”

“…Cyclic trimeric perfluoro-o-phenylenemercury (o-C 6 F 4 Hg) 3 (1) [1,2] which contains three Hg atoms in a planar nine-membered cycle, exhibits a high affinity towards various anions [3] and neutral Lewis bases [4], forming complexes wherein the Lewis basic species is simultaneously bonded to all Hg centres of the macrocycle. This remarkable property of 1, being reminiscent of the behaviour of crown ethers and their thia and aza analogues in metal cation binding, may find useful applications in organic synthesis, ion transport and catalysis [5] (for complexing properties of other polymetallamacrocycles, see e.g.…”

Binding of ferrocene by cyclic trimeric perfluoro-o-phenylenemercury. Synthesis and structure of the first double-decker sandwich complex of a sandwich

“…The complex was prepared by the reaction of cyclic trimeric perfluoro o phenylene mercury (o C 6 F 4 Hg) 3 (1) with ferrocene in an ethereal solution at 20 °C and has the composi tion {[(o C 6 F 4 Hg) 3 ] 2 (Cp 2 Fe)} (2). The ferrocene sandwich in 2 is located between the planes of two mercury containing macrocycles and is coordinated to each of them through donation of the π electrons of the η 5 Cp ligands to vacant orbitals of the mercury atoms of the adjacent molecule 1.…”

“…Found (%): C, 24.14; H, 0.34; F, 20.20. Hg (2) Double decker sandwich complex of ferrocene Russ.Chem.Bull., Int.Ed., Vol. 53, No.…”

Cyclic trimeric perfluoro-o-phenylenemercury: a highly efficient phase transfer catalyst for nitration of aromatic substrates with dilute nitric acid

“…cyclic trimeric perfluoro-o-phenylenemercury (o-C 6 F 4 Hg) 3 (1) which also contains three Lewis acidic Hg centres in a planar nine-membered ring [16,17].…”