The epimeric 9-oxobicyclo[3.3.1]nonane-3-carboxylic acids: hydrogen-bonding patterns of the <i>endo</i> acid and the lactol of the <i>exo</i> acid
Papadakis, Markos M.; Pavon, Jorge A.; Lalancette, Roger A.; Thompson, Hugh W.; Acta Crystallographica Section C 59 (2003) o167–o170; doi:10.1107/S0108270103001495

data_2013149
_publ_section_title
;
 The epimeric 9-oxobicyclo[3.3.1]nonane-3-carboxylic acids:
 hydrogen-bonding patterns of the <i>endo</i> acid and the lactol of
 the <i>exo</i> acid
;
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o167
_journal_page_last               o170
_journal_paper_doi               10.1107/S0108270103001495
_journal_volume                  59
_journal_year                    2003
_chemical_formula_moiety         'C10 H14 O3'
_chemical_formula_sum            'C10 H14 O3'
_chemical_formula_weight         182.21
_chemical_melting_point          422
_chemical_name_common
;
 9-oxobicyclo[3.3.1]nonane-3\b-carboxylic acid lactol
;
_chemical_name_systematic
;
8-hydroxy-9-oxatricyclo[5.3.1.0^3,8^]undecan-10-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'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90
_cell_angle_beta                 92.64(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.331(4)
_cell_length_b                   9.288(7)
_cell_length_c                   12.669(7)
_cell_measurement_reflns_used    30
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      11.9
_cell_measurement_theta_min      2.8
_cell_volume                     861.7(9)
_computing_cell_refinement       XSCANS
_computing_data_collection       'XSCANS (Siemens, 1996)'
_computing_data_reduction        XSCANS
_computing_molecular_graphics    'SHELXP97 in SHELXTL'
_computing_publication_material  'SHELXL97 in SHELXTL'
_computing_structure_refinement  'SHELXL97 in SHELXTL'
_computing_structure_solution    'SHELXS97 in SHELXTL (Sheldrick, 1997)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Siemens P4'
_diffrn_measurement_method       2\q/\q
_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  0.025
_diffrn_reflns_av_sigmaI/netI    0.030
_diffrn_reflns_limit_h_max       0
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            2946
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.72
_diffrn_standards_decay_%        'variation < 1.0'
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.103
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.404
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       parallelepiped
_exptl_crystal_F_000             392
_exptl_crystal_size_max          0.44
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.16
_refine_diff_density_min         -0.15
_refine_ls_extinction_coef       0.044(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 in SHELXTL (Sheldrick, 1997)'
_refine_ls_goodness_of_fit_ref   1.03
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     122
_refine_ls_number_reflns         1512
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.03
_refine_ls_R_factor_all          0.043
_refine_ls_R_factor_gt           0.033
_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^)+(0.0326P)^2^+0.1747P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.079
_refine_ls_wR_factor_ref         0.084
_reflns_number_gt                1239
_reflns_number_total             1512
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fr1406.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 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2013149
_cod_database_fobs_code          2013149