(±)-1-Indanone-2-acetic and -2-propionic acids: catemeric <i>versus</i> dimeric hydrogen bonding in homologous γ- and δ-keto acids
Lalancette, Roger A.; Brunskill, Andrew P. J.; Thompson, Hugh W.; Acta Crystallographica Section C 55 (1999) 568–572; doi:10.1107/S0108270198017405

data_2008349
_publ_section_title
;
 (+-)-1-Indanone-2-acetic and -2-propionic acids: catemeric
 <i>versus</i> dimeric hydrogen bonding in homologous \g- and \d-keto
 acids
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              568
_journal_page_last               572
_journal_paper_doi               10.1107/S0108270198017405
_journal_volume                  55
_journal_year                    1999
_chemical_formula_moiety         'C12 H12 O3'
_chemical_formula_sum            'C12 H12 O3'
_chemical_formula_weight         204.22
_chemical_melting_point          381
_chemical_name_common
;
(+-)-1-Indanone-2-propionic Acid
;
_chemical_name_systematic
;
(+\-)-2-(2-carboxyethyl)-2,3-dihydro-1H-inden-1-one
;
_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'
_audit_creation_method           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 96.200(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.0930(10)
_cell_length_b                   8.3260(10)
_cell_length_c                   15.614(2)
_cell_measurement_reflns_used    45
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      17.30
_cell_measurement_theta_min      4.64
_cell_volume                     1046.0(2)
_computing_cell_refinement       XSCANS
_computing_data_collection       'XSCANS (Siemens, 1996)'
_computing_data_reduction        XSCANS
_computing_molecular_graphics    SHELXL97
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device       'Siemens P4'
_diffrn_measurement_method       '2\q/\q scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.023
_diffrn_reflns_av_sigmaI/netI    0.032
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            2862
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.53
_diffrn_standards_decay_%        'Intensity variation +-1'
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_T_max  0.968
_exptl_absorpt_correction_T_min  0.947
_exptl_absorpt_correction_type   'Face-indexed numerical (Sheldrick, 1997)'
_exptl_crystal_colour            'Pale yellow'
_exptl_crystal_density_diffrn    1.297
_exptl_crystal_density_meas      1.290(10)
_exptl_crystal_density_method    'flotation in CCl~4~/p-xylene'
_exptl_crystal_description       Tabular
_exptl_crystal_F_000             432
_exptl_crystal_size_max          0.70
_exptl_crystal_size_mid          0.62
_exptl_crystal_size_min          0.40
_refine_diff_density_max         0.165
_refine_diff_density_min         -0.115
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.06
_refine_ls_hydrogen_treatment    'H atoms: see below'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     148
_refine_ls_number_reflns         2055
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.06
_refine_ls_R_factor_all          0.074
_refine_ls_R_factor_gt           0.048
_refine_ls_shift/su_max          <0.001
_refine_ls_shift/su_mean         0.00
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0557P)^2^+0.2204P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.134
_reflns_number_gt                1452
_reflns_number_total             2056
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fg1525.cif
_cod_data_source_block           II
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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 'Monoclinic' changed to 'monoclinic'
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 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2008349