An axially chiral 1,2-diketone: 1-(3,4-dimethoxyphenyl)propane-1,2-dione
Hartung, Jens; Špehar, Kristina; Svoboda, Ingrid; Fuess, Hartmut; Acta Crystallographica Section E 60 (2004) o750–o751; doi:10.1107/S1600536804007755

data_2203589
_publ_section_title
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 An axially chiral 1,2-diketone:
 1-(3,4-dimethoxyphenyl)propane-1,2-dione
;
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o750
_journal_page_last               o751
_journal_paper_doi               10.1107/S1600536804007755
_journal_volume                  60
_journal_year                    2004
_chemical_formula_iupac          'C11 H12 O4'
_chemical_formula_moiety         'C11 H12 O4'
_chemical_formula_sum            'C11 H12 O4'
_chemical_formula_weight         208.21
_chemical_name_systematic
;
1-(3,4-dimethoxyphenyl)propane-1,2-dione
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                65.00(2)
_cell_angle_beta                 72.01(2)
_cell_angle_gamma                62.82(2)
_cell_formula_units_Z            2
_cell_length_a                   7.927(2)
_cell_length_b                   8.185(2)
_cell_length_c                   10.018(2)
_cell_measurement_reflns_used    1238
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      22.095
_cell_measurement_theta_min      2.265
_cell_volume                     518.6(2)
_computing_cell_refinement
;
CrysAlis RED (Oxford Diffraction, 2001)
;
_computing_data_collection
;
CrysAlis CCD (Oxford Diffraction, 2001)
;
_computing_data_reduction
;
CrysAlis RED
;
_computing_molecular_graphics
;
ORTEP-3 (Farrugia, 1997) and PLATON2002 (Spek, 2002)
;
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      298(2)
_diffrn_detector_area_resol_mean 'Sapphire CCD detector'
_diffrn_measured_fraction_theta_full 0.966
_diffrn_measured_fraction_theta_max 0.966
_diffrn_measurement_device_type  'Oxford Diffraction Xcalibur CCD'
_diffrn_measurement_method
;
Rotation method data acquisition using \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  0.0283
_diffrn_reflns_av_sigmaI/netI    0.0500
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            4883
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         4.29
_diffrn_standards_decay_%        stable
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.102
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.333
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             220
_exptl_crystal_size_max          0.52
_exptl_crystal_size_mid          0.34
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.140
_refine_diff_density_min         -0.176
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.843
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     136
_refine_ls_number_reflns         2054
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.843
_refine_ls_R_factor_all          0.0985
_refine_ls_R_factor_gt           0.0443
_refine_ls_shift/su_max          0.010
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0801P)^2^] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1076
_refine_ls_wR_factor_ref         0.1339
_reflns_number_gt                1102
_reflns_number_total             2054
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fl6091.cif
_cod_data_source_block           I
_cod_depositor_comments
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The following automatic conversions were performed:

'_chemical_melting_point' value 'not measured' was changed to '?' -
the value is undefined or not given.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 

The following automatic conversions were performed:

'_chemical_melting_point' value 'not measured' was changed to '?' -
the value is undefined or not given.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               2203589
_cod_database_fobs_code          2203589