 (0000[@bb0]). For puckering parameters, see: Cremer & Pople (0000[@bb0]). For standard bond lengths, see: Allen *et al.* (0000[@bb0]).  Experimental   {#sec0} ==============   {#sec0.0}  ### Crystal data   {#sec0.0.0}  C~00~H~00~ClN~0~O~0~*M* *~r~* = 000.00