3,4,5-Trimethoxybenzoic acid
Ghulam Qadeer; Nasim Hasan Rama; Murat Tas̨; Okan Zafer Yes̨ilel; Wai-Yeung Wong; Acta Crystallographica Section E 63 (2007) o3456–o3456; doi:10.1107/S1600536807033429

data_2214732
_publ_section_title
;
 3,4,5-Trimethoxybenzoic acid
;
_journal_coeditor_code           HK2288
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o3456
_journal_page_last               o3456
_journal_paper_doi               10.1107/S1600536807033429
_journal_volume                  63
_journal_year                    2007
_chemical_formula_iupac          'C10 H12 O5'
_chemical_formula_moiety         'C10 H12 O5'
_chemical_formula_sum            'C10 H12 O5'
_chemical_formula_weight         212.20
_chemical_name_systematic
;
3,4,5-Trimethoxybenzoic acid
;
_space_group_IT_number           7
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P -2yc'
_symmetry_space_group_name_H-M   'P 1 c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 96.576(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.3384(3)
_cell_length_b                   8.8325(3)
_cell_length_c                   15.7560(5)
_cell_measurement_reflns_used    1520
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      22.56
_cell_measurement_theta_min      2.79
_cell_volume                     1014.53(6)
_computing_cell_refinement       APEX2
_computing_data_collection       'APEX2 (Bruker, 2005)'
_computing_data_reduction        APEX2
_computing_molecular_graphics    'ORTEP-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker APEXII area-detector'
_diffrn_measurement_method       '\f and \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  0.0316
_diffrn_reflns_av_sigmaI/netI    0.0411
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            7599
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         2.60
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.112
_exptl_absorpt_correction_T_max  0.984
_exptl_absorpt_correction_T_min  0.935
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.389
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       monoclinic
_exptl_crystal_F_000             448
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.183
_refine_diff_density_min         -0.166
_refine_ls_extinction_coef       0.015(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.059
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     281
_refine_ls_number_reflns         2510
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.058
_refine_ls_R_factor_all          0.0701
_refine_ls_R_factor_gt           0.0388
_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^)+(0.0445P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0878
_refine_ls_wR_factor_ref         0.0941
_reflns_number_gt                1563
_reflns_number_total             2510
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            hk2288.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P c'
_cod_database_code               2214732
_cod_database_fobs_code          2214732