2,2'-Dimethoxy-4,4'-[<i>rel</i>-(2<i>R</i>,3<i>S</i>)-2,3-dimethylbutane-1,4-diyl]diphenol
Salinas-Salazar, Carmen L.; Camacho-Corona, María del Rayo; Bernès, Sylvain; Waksman de Torres, Noemi; Acta Crystallographica Section E 65 (2009) o1279–; doi:10.1107/S1600536809017292

data_2222077
_publ_section_title
2,2'-Dimethoxy-4,4'-[<i>rel</i>-(2<i>R</i>,3<i>S</i>)-2,3-dimethylbutane-1,4-diyl]diphenol
_journal_coeditor_code           IS2391
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1279
_journal_paper_doi               10.1107/S1600536809017292
_journal_volume                  65
_journal_year                    2009
_chemical_formula_moiety         'C20 H26 O4'
_chemical_formula_sum            'C20 H26 O4'
_chemical_formula_weight         330.41
_chemical_melting_point          360
_chemical_name_common            'meso-Dihydroguaiaretic acid'
_chemical_name_systematic
;
2,2'-Dimethoxy-4,4'-[<i>rel</i>-(2<i>R</i>,3<i>S</i>)-2,3-dimethylbutane-
1,4-diyl]diphenol
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXTL-Plus
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.1355(8)
_cell_length_b                   12.024(2)
_cell_length_c                   30.158(5)
_cell_measurement_reflns_used    54
_cell_measurement_temperature    298.0(10)
_cell_measurement_theta_max      10.96
_cell_measurement_theta_min      4.42
_cell_volume                     1862.2(5)
_computing_cell_refinement       'XSCANS (Siemens, 1996)'
_computing_data_collection       'XSCANS (Siemens, 1996)'
_computing_data_reduction        'XSCANS (Siemens, 1996)'
_computing_molecular_graphics
;
SHELXL97 (Sheldrick, 2008) and Mercury (Macrae <i>et al.</i>,
2006)
;
_computing_publication_material  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      298.0(10)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Siemens P4'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1587
_diffrn_reflns_av_sigmaI/netI    0.1274
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       1
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       1
_diffrn_reflns_limit_l_min       -35
_diffrn_reflns_number            3966
_diffrn_reflns_theta_full        25.01
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         1.82
_diffrn_standards_decay_%        1
_diffrn_standards_interval_count 98
_diffrn_standards_number         2
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.179
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             712
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.180
_refine_diff_density_min         -0.166
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.997
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     227
_refine_ls_number_reflns         1937
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      0.996
_refine_ls_R_factor_all          0.1038
_refine_ls_R_factor_gt           0.0542
_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^)+(0.0472P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1156
_refine_ls_wR_factor_ref         0.1390
_reflns_number_gt                1196
_reflns_number_total             1937
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            is2391.cif
_cod_data_source_block           I
_cod_database_code               2222077
_cod_database_fobs_code          2222077