Macrocalyxin I
Shi, Hao; Pan, Yuan Jiang; Acta Crystallographica Section C 58 (2002) o55–o56; doi:10.1107/S0108270101018625

data_2012466
_publ_section_title
;
 Macrocalyxin I
;
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o55
_journal_page_last               o56
_journal_paper_doi               10.1107/S0108270101018625
_journal_volume                  58
_journal_year                    2002
_chemical_formula_iupac          'C20 H30 O3'
_chemical_formula_moiety         'C20 H30 O3'
_chemical_formula_sum            'C20 H30 O3'
_chemical_formula_weight         318.44
_chemical_melting_point          491.5(10)
_chemical_name_common            'Macrocalyxin I'
_chemical_name_systematic
;2-[1,2,3,4,4a,4b,5,6,7,8,8a,9-dodecahydro-7-hydroxy-4b,8,8-trimethylphenanthren-
2-yl]propenoic
 acid
;
_space_group_IT_number           5
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 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                 101.350(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   24.066(2)
_cell_length_b                   10.0170(10)
_cell_length_c                   7.6080(10)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      12.29
_cell_measurement_theta_min      3.29
_cell_volume                     1798.2(3)
_computing_cell_refinement       XSCANS
_computing_data_collection       'XSCANS (Siemens, 1994)'
_computing_data_reduction        XSCANS
_computing_molecular_graphics    'XP in SHELXTL/PC (Siemens, 1991)'
_computing_publication_material  SHELXTL/PC
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Siemens P4'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     .71073
_diffrn_reflns_av_R_equivalents  .0164
_diffrn_reflns_av_sigmaI/netI    .0358
_diffrn_reflns_limit_h_max       31
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            2311
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.73
_diffrn_standards_decay_%        1.26
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    .077
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.176
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             696
_exptl_crystal_size_max          .50
_exptl_crystal_size_mid          .50
_exptl_crystal_size_min          .40
_refine_diff_density_max         .153
_refine_diff_density_min         -.118
_refine_ls_abs_structure_details 'see text'
_refine_ls_extinction_coef       .035(2)
_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   .980
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     214
_refine_ls_number_reflns         2178
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      .980
_refine_ls_R_factor_all          .0576
_refine_ls_R_factor_gt           .0400
_refine_ls_shift/su_max          <0.001
_refine_ls_shift/su_mean         .000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0509P)^2^] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          .0907
_refine_ls_wR_factor_ref         .0968
_reflns_number_gt                1605
_reflns_number_total             2178
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ta1347.cif
_cod_data_source_block           I
_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:

'_chemical_melting_point' value '490.5-492.5K' was changed to
'491.5(10)' - the average value was taken and precision was
estimated.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 

The following automatic conversions were performed:

'_chemical_melting_point' value '490.5-492.5K' was changed to
'491.5(10)' - the average value was taken and precision was
estimated.

'_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      'C 2'
_cod_database_code               2012466