Received 18 March 2013
The title half-sandwich rhodium(III) complex, [Rh(C10H15)(C7H7O3S)2(H2O)]·H2O, consists of a -bonded pentamethylcyclopentadienyl group, two -bonded tosylate groups and an aqua ligand. The structure displays both inter- and intramolecular O-HO hydrogen bonding. The intermolecular hydrogen bonding results in an extended helical chain along a 21 screw axis parallel to c, due to hydrogen bonding from the coordinating water ligand to the lattice water molecule and then to a sulfonate O atom of a different asymmetric unit.
Synthesis details are given in Boyer et al. (1996). For the structure of another pentamethylcyclopentadienylmetal bis-tosylate (CCDC: 821138), see: Zaitsev et al. (2008). For the characterization of other aquo compounds, see: Bergmeister et al. (1990; CCDC: 601561) and Luo et al. (1990; CCDC: 595047). A survey of the geometry and environment of water molecules in crystalline hydrates studied by neutron diffraction can be found in in Ferraris & Franchini-Angela (1972).
Data collection: XSCANS (Siemens, 1994); cell refinement: XSCANS; data reduction: XSCANS; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: OLEX2 (Dolomanov et al., 2009); software used to prepare material for publication: OLEX2.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: PK2474 ).
We acknowledge the financial support of the NSF (CHE 9214027) and ACS-PRF (23961-ACl). PMB acknowledges an ACS-PRF undergraduate summer fellowship. Funds for the purchase of the diffractometer used in this work were provided by the Commonwealth of Virginia.
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