3-Oxocyclobutanecarboxylic acid: hydrogen bonding in a small-ring γ-keto acid
Efthimiopoulos, Georgia; Thompson, Hugh W.; Lalancette, Roger A.; Acta Crystallographica Section E 65 (2009) o492–; doi:10.1107/S1600536809003961

data_2221062
_publ_section_title
;
 3-Oxocyclobutanecarboxylic acid: hydrogen bonding in a small-ring
 \g-keto acid
;
_journal_coeditor_code           FL2232
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o492
_journal_paper_doi               10.1107/S1600536809003961
_journal_volume                  65
_journal_year                    2009
_chemical_formula_iupac          'C5 H6 O3'
_chemical_formula_moiety         'C5 H6 O3'
_chemical_formula_sum            'C5 H6 O3'
_chemical_formula_weight         114.10
_chemical_melting_point          342
_chemical_name_common            'cyclobutanone-3-carboxylic acid'
_chemical_name_systematic
;
3-Oxocyclobutanecarboxylic acid
;
_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           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 106.899(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.8858(19)
_cell_length_b                   5.3631(12)
_cell_length_c                   11.625(3)
_cell_measurement_reflns_used    3724
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      66.67
_cell_measurement_theta_min      3.97
_cell_volume                     530.1(2)
_computing_cell_refinement       'SAINT (Bruker, 2006)'
_computing_data_collection       'APEX2 (Bruker, 2006)'
_computing_data_reduction        'SAINT (Bruker, 2005)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXTL (Sheldrick, 2008)'
_computing_structure_solution    'SHELXTL (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.954
_diffrn_measured_fraction_theta_max 0.954
_diffrn_measurement_device_type  'Bruker SMART CCD APEXII area-detector'
_diffrn_measurement_method       '\f and \w'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0185
_diffrn_reflns_av_sigmaI/netI    0.0125
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            3854
_diffrn_reflns_theta_full        66.70
_diffrn_reflns_theta_max         66.70
_diffrn_reflns_theta_min         5.20
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.030
_exptl_absorpt_correction_T_max  0.861
_exptl_absorpt_correction_T_min  0.638
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2008)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.430
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       parallelepiped
_exptl_crystal_F_000             240
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.249
_refine_diff_density_min         -0.168
_refine_ls_extinction_coef       0.0140(13)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXTL (Sheldrick, 2008)'
_refine_ls_goodness_of_fit_ref   1.06
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     77
_refine_ls_number_reflns         906
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.06
_refine_ls_R_factor_all          0.029
_refine_ls_R_factor_gt           0.029
_refine_ls_shift/su_max          0.00
_refine_ls_shift/su_mean         0.00
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0304P)^2^+0.27P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.070
_refine_ls_wR_factor_ref         0.070
_reflns_number_gt                891
_reflns_number_total             906
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fl2232.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2221062
_cod_database_fobs_code          2221062