Conformation of cis,trans-1,3,5-trimethylcyclohexane-1,3,5-tricarboxylic acid derivatives: crystal structures and semiempirical molecular orbital calculations
Thuéry, Pierre; Nierlich, Martine; Baldwin, Bruce W.; Aoki, Yoshio; Hirose, Takuji; Journal of the Chemical Society, Perkin Transactions 2  (1999) 2077–; doi:10.1039/a904475b

data_7213123
_publ_section_title
;
 Conformation of cis,trans-1,3,5-trimethylcyclohexane-1,3,5-tricarboxylic
 acid derivatives: crystal structures and semiempirical molecular orbital
 calculations
;
_journal_issue                   10
_journal_name_full
'Journal of the Chemical Society, Perkin Transactions 2'
_journal_page_first              2077
_journal_paper_doi               10.1039/a904475b
_journal_year                    1999
_chemical_formula_sum            'C23 H32 O6'
_chemical_formula_weight         404.49
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 93.695(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.3529(12)
_cell_length_b                   6.4184(5)
_cell_length_c                   19.1454(13)
_cell_measurement_reflns_used    20567
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      26.68
_cell_measurement_theta_min      2.22
_cell_volume                     2250.6(3)
_computing_cell_refinement       'HKL package (Otwinowski & Minor, 1997)'
_computing_data_collection       'Kappa-CCD software (Nonius, 1997)'
_computing_data_reduction        'HKL package (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 1997)'
_computing_publication_material  'SHELXTL (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measurement_device       'Nonius Kappa-CCD'
_diffrn_measurement_method       'area detector'
_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  0.0357
_diffrn_reflns_av_sigmaI/netI    0.0469
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            20567
_diffrn_reflns_theta_max         26.68
_diffrn_reflns_theta_min         2.22
_diffrn_standards_decay_%        none
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.194
_exptl_crystal_density_meas      ?
_exptl_crystal_description       platelet
_exptl_crystal_F_000             872
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.551
_refine_diff_density_min         -0.299
_refine_diff_density_rms         0.042
_refine_ls_extinction_coef       0.0134(78)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_all   1.182
_refine_ls_goodness_of_fit_obs   1.214
_refine_ls_hydrogen_treatment    'see text'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     292
_refine_ls_number_reflns         3863
_refine_ls_number_restraints     61
_refine_ls_restrained_S_all      1.449
_refine_ls_restrained_S_obs      1.318
_refine_ls_R_factor_all          0.1682
_refine_ls_R_factor_obs          0.0783
_refine_ls_shift/esd_max         0.004
_refine_ls_shift/esd_mean        0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0985P)^2^+1.9041P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.3331
_refine_ls_wR_factor_obs         0.1995
_reflns_number_observed          1762
_reflns_number_total             3863
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            904475bsup1.cif
_cod_data_source_block           1a
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 

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 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0985P)^2^+1.9041P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0985P)^2^+1.9041P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        2251(3)
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7213123