Hexaaquacadmium(II) di-(S)-camphor-10-sulfonate

Abstract

The Cd atom in the title compound, [Cd(H2O)6](C10H15O4S)2, shows octahedral coordination. The cation is linked to the two anions by extensive hydrogen bonds.

A supramolecular ladder in diaqua(μ-8-hydroxy-7-iodoquinoline-5-sulfonato-κ4N,O,O′,O′′)cadmium(II) dihydrate

“…The bond distances and angles are listed in Table 1. The CdÐO(sulfonate) bond distances in (I) agree with those reported in other cadmium±sulfonate complexes (Cai et al, 2001;Zhou et al, 2003;Harvey et al, 2003). However, these values are slightly longer than those in the cadmium phosphonate complex (Mao et al, 2002).…”

Hydrogen-Bonded Metal-Complex Sulfonate (MCS) Inclusion Compounds: Effect of the Guest Molecule on the Host Framework

“…One idea, pioneered mainly by Shimizu and co-workers, , is to use layers that can coordinate to transition metals as shown in Figure b. Thus, the guanidinium cation with its three amino groups can be “substituted” by various transition-metal coordinated ligands with protons available for hydrogen bonding such as ammonia, − amines, − or water molecules. ,, The second coordination sphere of an octahedral hexaaqua or hexaammine metal complex, for example, can mimic two staggered guanidinium cations from neighboring layers when the complex is positioned with its C 3 axis perpendicular to the layers (Figure a, b). This arrangement, however, has been observed only in two compounds so far. , The preferred orientation of the metal complex seems to be rather with its C 4 axis normal to the layers and with hydrogen-bonded sulfonate groups that formally cap the faces (Figure c).…”

“…Thus, the guanidinium cation with its three amino groups can be "substituted" by various transition-metal coordinated ligands with protons available for hydrogen bonding such as ammonia, [10][11][12][13] amines, [14][15][16][17] or water molecules. 14,18,19 The second coordination sphere of an octahedral hexaaqua or hexaammine metal complex, for example, can mimic two staggered guanidinium cations from neighboring layers when the complex is positioned with its C 3 axis perpendicular to the layers (Figure 2a, b). This arrangement, however, has been observed only in two compounds so far.…”

Tetraaquabis(D-camphor-10-sulfonato)calcium(II)

“…The crystal structures of the related [M(H 2 O) 6 ](C 10 H 15 -O 4 S) 2 complexes (M = Zn II , Cu II , Cd II , Ni II and Mg II ; Couldwell et al, 1978;Henderson & Nicholson, 1995;Schepke et al, 2007;Zhou et al, 2003;Jeremić et al 2008) consist of [M(H 2 O) 6 ] 2+ cations and two crystallogaphically independent d-camphor-10-sulfonate anions arranged in alternating layers held together by hydrogen bonds. All the complexes crystallize in the chiral monoclinic P2 1 space group and are isostructural.…”

“…As part of our research on new optical materials, we recently prepared and characterized the magnesium salt of d-camphor-10-sulfonate (Jeremić et al, 2008). This compound was found to be similar to other divalent metal (Zn II , Cu II , Cd II and Ni II ) salts of this anion that have been reported (Couldwell et al, 1978;Henderson & Nicholson, 1995;Schepke et al, 2007;Zhou et al, 2003). In none of these does the camphorsulfonate anion bond directly to the metal cation.…”