Tetra(tetraethylbutylammonium bromide) di(DL-tartaric acid) tetrahydrate
Callear, Samantha K.; Hursthouse, Michael B.; Threlfall, Terence L.; Crystal Structure Report Archive  (2008) 574–; doi:

data_1519971
_publ_section_title
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 Tetra(tetraethylbutylammonium bromide) di(DL-tartaric acid) tetrahydrate
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_journal_name_full               'Crystal Structure Report Archive'
_journal_page_first              574
_journal_year                    2008
_chemical_formula_sum            'C20 H50 Br2 N2 O8'
_chemical_formula_weight         606.44
_chemical_name_systematic
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Tetra(tetraethylbutylammonium bromide) di(DL-tartaric acid)
tetrahydrate
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_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                64.325(8)
_cell_angle_beta                 78.777(9)
_cell_angle_gamma                89.720(7)
_cell_formula_units_Z            4
_cell_length_a                   13.912(2)
_cell_length_b                   14.2967(7)
_cell_length_c                   16.456(2)
_cell_measurement_reflns_used    13192
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     2881.8(6)
_computing_cell_refinement
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
_computing_data_collection       'COLLECT (Hooft, R.W.W., 1998)'
_computing_data_reduction
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type
'Bruker-Nonius 95mm CCD camera on \k-goniostat'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  '10cm confocal mirrors'
_diffrn_radiation_source         'Bruker-Nonius FR591 rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0756
_diffrn_reflns_av_sigmaI/netI    0.0673
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            64930
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.00
_exptl_absorpt_coefficient_mu    2.854
_exptl_absorpt_correction_T_max  0.9193
_exptl_absorpt_correction_T_min  0.7634
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2.10 (Sheldrick, G.M., 2003)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.398
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1272
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.03
_refine_diff_density_max         1.246
_refine_diff_density_min         -0.785
_refine_diff_density_rms         0.099
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.012
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     704
_refine_ls_number_reflns         13207
_refine_ls_number_restraints     17
_refine_ls_restrained_S_all      1.012
_refine_ls_R_factor_all          0.0859
_refine_ls_R_factor_gt           0.0488
_refine_ls_shift/su_max          0.007
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0384P)^2^+4.5286P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0976
_refine_ls_wR_factor_ref         0.1111
_reflns_number_gt                9166
_reflns_number_total             13207
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            eCrystal-574.cif
_cod_data_source_block           04skc0011p-18
_cod_depositor_comments
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Citation :
Callear, Samantha K. and Hursthouse, Michael B. and 
Threlfall, Terence L. (2008) 
University of Southampton, Crystal Structure Report Archive. 
(doi:10.5258/ecrystals/574)

More at:
http://ecrystals.chem.soton.ac.uk/574/
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_cod_original_cell_volume        2881.6(6)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               1519971