Polymorphism in a TADDOL analogue induced by the presence of a chiral impurity
Prasad, Kavirayani R.; Chandrakumar, Appayee; Dikundwar, Amol G.; Guru Row, T. N.; CrystEngComm 12 (2010) 3452–; doi:10.1039/c0ce00103a

data_7212781
_publ_section_title
;
 Polymorphism in a TADDOL analogue induced by the presence of a chiral
 impurity
;
_journal_issue                   11
_journal_name_full               CrystEngComm
_journal_page_first              3452
_journal_paper_doi               10.1039/c0ce00103a
_journal_volume                  12
_journal_year                    2010
_chemical_absolute_configuration unk
_chemical_compound_source        'see text'
_chemical_formula_moiety         'C21 H26 O4'
_chemical_formula_sum            'C21 H26 O4'
_chemical_formula_weight         342.42
_chemical_name_common            'TADDOL FORM A'
_chemical_name_systematic        'TADDOL FORM A'
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      19
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.5968(8)
_cell_length_b                   9.7560(9)
_cell_length_c                   23.391(2)
_cell_measurement_reflns_used    3845
_cell_measurement_temperature    293(1)
_cell_measurement_theta_max      26.00
_cell_measurement_theta_min      1.7
_cell_volume                     1961.8(3)
_computing_cell_refinement       Apex2
_computing_data_collection       'Bruker kappa Apex2'
_computing_data_reduction        SAINT32
_computing_molecular_graphics
'Ortep-3 (Farrugia, 1997) and CAMERON (Watkin et al., 1993)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(1)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Brucker kappa apex2 CCD area detector'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0336
_diffrn_reflns_av_sigmaI/netI    0.0322
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            15354
_diffrn_reflns_reduction_process
;
;
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.74
_exptl_absorpt_coefficient_mu    0.079
_exptl_absorpt_correction_T_max  0.9844
_exptl_absorpt_correction_T_min  0.9767
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Apex2 (Bruker)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.159
_exptl_crystal_density_method    'Not Measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             736
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.158
_refine_diff_density_min         -0.227
_refine_diff_density_rms         0.047
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.2(13)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.150
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     232
_refine_ls_number_reflns         3845
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.150
_refine_ls_R_factor_all          0.0664
_refine_ls_R_factor_gt           0.0526
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0497P)^2^+0.1559P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1068
_refine_ls_wR_factor_ref         0.1115
_reflns_number_gt                3220
_reflns_number_total             3845
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0ce00103a.txt
_cod_data_source_block           ack2_m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' 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 
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_cod_database_code               7212781