Two succinic acid derivatives of 2-ethyl-6-methylpyridin-3-ol
Lyakhov, Alexander S.; Ivashkevich, Ludmila S.; Survilo, Vladimir L.; Trukhachova, Tatjana V.; Acta Crystallographica Section C 68 (2012) o33–o36; doi:10.1107/S0108270111054692

data_2018366
_publ_section_title
;
 Two succinic acid derivatives of 2-ethyl-6-methylpyridin-3-ol
;
_journal_coeditor_code           YF3010
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o33
_journal_page_last               o36
_journal_paper_doi               10.1107/S0108270111054692
_journal_volume                  68
_journal_year                    2012
_chemical_formula_iupac          'C8 H12 N O + , C4 H5 O4 -'
_chemical_formula_moiety         'C8 H12 N O +, C4 H5 O4 -'
_chemical_formula_sum            'C12 H17 N O5'
_chemical_formula_weight         255.27
_chemical_name_common
;
2-ethyl-6-methyl-3-hydroxypyridinium hydrogen succinate
;
_chemical_name_systematic
;
2-ethyl-6-methyl-3-hydroxypyridinium 3-carboxypropionate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 93.8860(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.4951(2)
_cell_length_b                   12.4787(2)
_cell_length_c                   9.19860(10)
_cell_measurement_reflns_used    6600
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      29.86
_cell_measurement_theta_min      2.41
_cell_volume                     1316.45(3)
_computing_cell_refinement       'SAINT (Bruker, 2010)'
_computing_data_collection       'APEX2 (Bruker, 2010)'
_computing_data_reduction        'SAINT (Bruker, 2010)'
_computing_molecular_graphics    'PLATON (Spek, 2009)'
_computing_publication_material
;
SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009)
;
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR2004 (Burla <i>et al.</i>, 2005)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEXII CCD area-detector'
_diffrn_measurement_method       '\f and \w scans'
_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  0.0202
_diffrn_reflns_av_sigmaI/netI    0.0150
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            12765
_diffrn_reflns_theta_full        26.49
_diffrn_reflns_theta_max         26.49
_diffrn_reflns_theta_min         1.78
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.100
_exptl_absorpt_correction_T_max  0.9851
_exptl_absorpt_correction_T_min  0.9515
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2008)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.288
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             544
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.275
_refine_diff_density_min         -0.237
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     167
_refine_ls_number_reflns         2733
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0569
_refine_ls_R_factor_gt           0.0469
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0728P)^2^+0.4496P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1298
_refine_ls_wR_factor_ref         0.1405
_reflns_number_gt                2226
_reflns_number_total             2733
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            yf3010.cif
_cod_data_source_block           II
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2018366
_cod_database_fobs_code          2018366