, 0000[@bb00]); program(s) used to solve structure: *SIR00* (Altomare *et al.*, 0000[@bb0]); program(s) used to refine structure: *SHELXL00* (Sheldrick, 0000[@bb0]); molecular graphics: *ORTEP-0 for Windows* (Farrugia, 0000[@bb0]); software used to prepare material for publication: *WinGX* (Farrugia, 0000[@bb0]).  Supplementary Material ======================  Crystal structure: contains datablock(s) global, I. DOI: [00.0000/S000000000000000X/su0000sup0.cif](http://dx.doi.org/00.0000/S000000000000000X/su0000sup0.cif)  Structure factors: contains datablock(s) I. DOI: [00.0000/S000000000000000X/su0000Isup0.hkl](http://dx.doi.org/00.0000/S000000000000000X/su0000Isup0.hkl)  Supplementary material file. DOI: [00.0000/S000000000000000