<i>trans</i>-4-Acetylcyclohexanecarboxylic acid and (±)-<i>trans</i>-2-acetylcyclohexanecarboxylic acid: hydrogen-bonding patterns in two isomeric keto acids
Newman, Jacob M.; Thompson, Hugh W.; Lalancette, Roger A.; Acta Crystallographica Section C 58 (2002) o693–o696; doi:10.1107/S0108270102018553

data_2013065
_publ_section_title
;
 <i>trans</i>-4-Acetylcyclohexanecarboxylic acid and
 (+-)-<i>trans</i>-2-acetylcyclohexanecarboxylic acid: hydrogen-bonding
 patterns in two isomeric keto acids
;
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o693
_journal_page_last               o696
_journal_paper_doi               10.1107/S0108270102018553
_journal_volume                  58
_journal_year                    2002
_chemical_formula_iupac          'C9 H14 O3'
_chemical_formula_moiety         'C9 H14 O3'
_chemical_formula_sum            'C9 H14 O3'
_chemical_formula_weight         170.20
_chemical_melting_point          384
_chemical_name_systematic
;
trans-4-acetylcyclohexanecarboxylic 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                 101.12(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.845(5)
_cell_length_b                   6.770(5)
_cell_length_c                   13.994(8)
_cell_measurement_reflns_used    13
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      9.1
_cell_measurement_theta_min      3.0
_cell_volume                     915.2(10)
_computing_cell_refinement       XSCANS)
_computing_data_collection       'XSCANS (Siemens, 1996)'
_computing_data_reduction        XSCANS)
_computing_molecular_graphics    'XP in SHELXL97'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (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  0.034
_diffrn_reflns_av_sigmaI/netI    0.044
_diffrn_reflns_limit_h_max       1
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       1
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            2253
_diffrn_reflns_theta_full        24.99
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         2.11
_diffrn_standards_decay_%        'variation <4.1'
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.235
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       parallelepiped
_exptl_crystal_F_000             368
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.19
_refine_diff_density_min         -0.17
_refine_ls_extinction_coef       0.012(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.04
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     110
_refine_ls_number_reflns         1608
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.04
_refine_ls_R_factor_all          0.100
_refine_ls_R_factor_gt           0.059
_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^)+(0.0538P)^2^+0.6069P]where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.139
_refine_ls_wR_factor_ref         0.166
_reflns_number_gt                996
_reflns_number_total             1608
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fr1396.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2013065
_cod_database_fobs_code          2013065