X-ray examination of the structure of the methyl-p-bromophenylsilaoxarophenanthrene molecule

Heterometallic Mercury Compounds: Classification and Analysis of Crystallographical and Structural Data

“…It is thus surrounded by four metal atoms (HgFe 2 Rh 2 ) where the dihedral angle between the M 2 Hg planes is 71.9°, which is substantially different from that noted above [103,111,112,121], The tin derivative [125] shows an unsupported FeSnFeHgFeSnFe skeleton in the [{(OC) 4 FeSnCI 2 Fe(CO) 4 } 2 Hg]" 2 anion. Another complex anion [126] contains a common Ge atom bridging the Co-Co bonds both of a Co 2 (CO) 7 and a Co 2 (CO) 6 unit, which is also bridged by a HgCo(CO) 4 17, Nos. 11-12, 1994 Heterometallic There are seven heterooctanuclear mercury clusters.…”

“…The relevant data are given in Table 1 where the first three entries [4][5][6] have mercury with digonal coordination to two chlorine atoms. The next four examples have mercury(ll) atoms in trigonal environments of chlorine [7,8], iodine [9] and silicon [10].…”

“…In this group of double salts of mercury(ll) there is an isolated monomeric mercury unit together with a heterometal unit, in which the coordination ranges from tetrahedral TeC 2 NCI [7], CON 4 [12], through pentacoordinate NaO s [14], hexacoordinate RhN 4 CI 2 [5], Mg0 6 [10], CrN 6 [11], TaCI 5 0 [13], K0 6 [16] and CoN 6 [17], hexa-plus heptacoordinate (K0 6 + K0 7 ) [15], to octacoordinate CoC 5 P 3 [9]. In one case [13] two TaCI 5 bi-tetrahedral structure about mercury is found.…”

Nucleophilic substitution inO-phenyldibenzofuranium and 10-phenylxanthonium cations

“…Com- [Phi ~-139 (14) 121 (14) 94 ( O-Phenyldii~zofuranium tetrafluoroborate (1). A solution of PhN2*BF4 -(20 g, 100 retool) in CF3COOH (50 mL) was added dropwise to a solution of dibenzofuran (8 g, 48 retool) in a mixture of CF3COOH (15 mL) and C6F 6 (15 mL) at 70--…”