T. Mak, Wai-Hing Yip, C. Kennard
1988
Citations
0
Influential Citations
12
Citations
Journal
Australian Journal of Chemistry
Abstract
The crystal structures of perfluorophenoxyacetic acid [(2, 3, 4, 5, 6-pentafluorophenoxy)acetic acid] and its anhydrous complexes with silver(I) and mercury(I) have been determined by X-ray diffraction and refined to residuals R = 0 046, 0 042 and 0 104 for 1235, 1789 and 2750 observed reflections respectively. The acid forms the usual hydrogen-bonded cyclic dimers [O---O, 2 705(3) A] with the oxyacetic acid side-chain synclinally oriented. Crystals are triclinic, space group P1 with Z2 in a cell of dimensions a 7 479(1), b 7 592(2), c 8 463(2) A, a 80 15(2), β 85 34(2), γ 61 31(1) A. The silver complex, [AgL], (1), has crystals with a 5 992(3), b 30 22(2), c 5 277(2) A, β 106 42(5)°, space group P2a and Z2. The bis-carboxylato (O, O’) dimers have Ag-Ag 2 943(1) A with Ag-O, 2 203, 2 230(3) A and O-Ag-O 161 6(2)°. The complex with mercury(I), [HgL] (2), is centrosymmetric with the usual linear O-Hg-Hg-O-bonds [Hg-Hg, 2 514(1) A Hg-O, 2 13(1) A O-Hg-Hg, 173 9(2)°]. Longer peripheral bonds to Hg [Hg-O, 2 63(1) A] produce a polymeric structure. Crystals of (2) are triclinic, space group P1 with Z1 in a cell of dimensions a 5 038(1), b 5 970(1), c 15 774(6) A, a 80 77(2), β 86 42(2), γ 84 38(2)°.