Tetramethylammonium bromide
Thierry Maris; Personal communication to COD  (2019) –; doi:

data_3500086
_publ_section_title
;
 Tetramethylammonium bromide
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_journal_name_full               'Personal communication to COD'
_journal_year                    2019
_chemical_formula_moiety         'Br, C4 H12 N'
_chemical_formula_sum            'C4 H12 Br N'
_chemical_formula_weight         154.06
_chemical_name_common            'tetramethylammonium bromide'
_space_group_crystal_system      tetragonal
_space_group_IT_number           129
_space_group_name_Hall           '-P 4a 2a'
_space_group_name_H-M_alt        'P 4/n m m :2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2013-03-28
_audit_creation_method
;
  Olex2 1.2
  (compiled Mar 21 2013 11:16:32, GUI svn.r4446)
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.6590(3)
_cell_length_b                   7.6590(3)
_cell_length_c                   5.4566(2)
_cell_measurement_reflns_used    4465
_cell_measurement_temperature    150
_cell_measurement_theta_max      69.203
_cell_measurement_theta_min      5.777
_cell_volume                     320.09(2)
_computing_cell_refinement       'SAINT v8.27A (Bruker, 2012)'
_computing_data_collection       'APEX2 (Bruker, 2012)'
_computing_data_reduction        'SAINT v8.27A (Bruker, 2012)'
_computing_molecular_graphics
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_publication_material
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O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_structure_refinement
;
XLMP, G.M. Sheldrick, Acta Cryst.
(2008). A64, 112-122
;
_computing_structure_solution
;
XS, G.M. Sheldrick, Acta Cryst.
(2008). A64, 112-122
;
_diffrn_ambient_temperature      150
_diffrn_detector_area_resol_mean 8.3
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker Microstar X8'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  'Helios Mirror Optics'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0566
_diffrn_reflns_av_unetI/netI     0.0172
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            5415
_diffrn_reflns_theta_full        69.19
_diffrn_reflns_theta_max         69.19
_diffrn_reflns_theta_min         8.12
_diffrn_source                   'Rotating-anode X-ray tube'
_exptl_absorpt_coefficient_mu    7.711
_exptl_absorpt_correction_T_max  0.7532
_exptl_absorpt_correction_T_min  0.6252
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2012/1 (Bruker,2012) was used for absorption correction.
wR2(int) was 0.0877 before and 0.0707 after correction.
The Ratio of minimum to maximum transmission is 0.8301.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            'clear light colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.598
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             156
_exptl_crystal_size_max          0.11
_exptl_crystal_size_mid          0.07
_exptl_crystal_size_min          0.04
_exptl_special_details
;
 ? 
;
_geom_special_details
;
 All esds (except the esd in the dihedral angle between two l.s. planes) 
 are estimated using the full covariance matrix.  The cell esds are taken 
 into account individually in the estimation of esds in distances, angles 
 and torsion angles; correlations between esds in cell parameters are only 
 used when they are defined by crystal symmetry.  An approximate (isotropic) 
 treatment of cell esds is used for estimating esds involving l.s. planes. 
;
_refine_diff_density_max         0.352
_refine_diff_density_min         -0.166
_refine_diff_density_rms         0.069
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.170
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     19
_refine_ls_number_reflns         195
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.170
_refine_ls_R_factor_all          0.0204
_refine_ls_R_factor_gt           0.0199
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0326P)^2^+0.1180P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0493
_refine_ls_wR_factor_ref         0.0496
_refine_special_details
;
 Refinement of F^2^ against ALL reflections.  The weighted R-factor wR and 
 goodness of fit S are based on F^2^, conventional R-factors R are based 
 on F, with F set to zero for negative F^2^. The threshold expression of 
 F^2^ > 2sigma(F^2^) is used only for calculating R-factors(gt) etc. and is 
 not relevant to the choice of reflections for refinement.  R-factors based 
 on F^2^ are statistically about twice as large as those based on F, and R- 
 factors based on ALL data will be even larger. 
;
_reflns_number_gt                191
_reflns_number_total             195
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1nbr.cif
_cod_data_source_block           c1nbr
_cod_depositor_comments          'Added Title/Name'
_cod_original_sg_symbol_H-M      'P 4/n m m'
_cod_database_code               3500086
_cod_database_fobs_code          3500086