Four <i>N</i>-Benzyl-Substituted 2-Ethyl-3-hydroxypyridin-4-ones
Burgess, John; Fawcett, John; Russell, David R.; Waltham, Emma; Acta Crystallographica Section C 54 (1998) 2011–2015; doi:10.1107/S0108270198008488

data_2008003
_publ_section_title
;
 Four <i>N</i>-Benzyl-Substituted 2-Ethyl-3-hydroxypyridin-4-ones
;
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              2011
_journal_page_last               2015
_journal_paper_doi               10.1107/S0108270198008488
_journal_volume                  54
_journal_year                    1998
_chemical_formula_moiety         'C15 H17 N O2'
_chemical_formula_sum            'C15 H17 N O2'
_chemical_formula_weight         243.30
_chemical_name_systematic
;
3-Hydroxy-2-ethyl-1-4methylbenzyl-pyridin-4-one
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_audit_creation_method           SHELXL
_cell_angle_alpha                91.395(6)
_cell_angle_beta                 90.823(8)
_cell_angle_gamma                117.258(9)
_cell_formula_units_Z            2
_cell_length_a                   7.2766(7)
_cell_length_b                   7.3473(6)
_cell_length_c                   13.2940(10)
_cell_measurement_reflns_used    27
_cell_measurement_temperature    190(2)
_cell_measurement_theta_max      12.40
_cell_measurement_theta_min      5.46
_cell_volume                     631.37(11)
_computing_cell_refinement       XSCANS
_computing_data_collection       'XSCANS (Fait, 1991)'
_computing_data_reduction        XSCANS
_computing_molecular_graphics    SHELXTL/PC
_computing_publication_material  SHELXTL/PC
_computing_structure_refinement  SHELXTL/PC
_computing_structure_solution    'SHELXTL/PC (Sheldrick, 1996)'
_diffrn_ambient_temperature      190(2)
_diffrn_measurement_device       '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  0.015
_diffrn_reflns_av_sigmaI/netI    0.0134
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       1
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            2605
_diffrn_reflns_theta_max         25
_diffrn_reflns_theta_min         3.07
_diffrn_standards_decay_%        <1
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.280
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             260
_exptl_crystal_size_max          0.58
_exptl_crystal_size_mid          0.48
_exptl_crystal_size_min          0.23
_refine_diff_density_max         0.306
_refine_diff_density_min         -0.267
_refine_ls_extinction_coef       0.066(8)
_refine_ls_extinction_method     SHELXTL/PC
_refine_ls_goodness_of_fit_all   1.031
_refine_ls_goodness_of_fit_obs   1.054
_refine_ls_hydrogen_treatment    'H atoms constrained'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     165
_refine_ls_number_reflns         2222
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.031
_refine_ls_restrained_S_obs      1.054
_refine_ls_R_factor_all          0.044
_refine_ls_R_factor_obs          0.039
_refine_ls_shift/esd_max         0.005
_refine_ls_shift/esd_mean        0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0586P)^2^+0.2944P] where P = Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.114
_refine_ls_wR_factor_obs         0.109
_reflns_number_observed          1980
_reflns_number_total             2222
_reflns_observed_criterion       I>2\s(I)
_cod_data_source_file            os1028.cif
_cod_data_source_block           4Me
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc w =
1/[\s^2^(Fo^2^)+(0.0586P)^2^+0.2944P] where P = Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to 'w =
1/[\s^2^(Fo^2^)+(0.0586P)^2^+0.2944P] where P = Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        631.37(9)
_cod_database_code               2008003