Generation of strong, homochiral bases by electrochemical reduction of phenazine derivatives.
Alonso, A Mateo; Horcajada, Roberto; Groombridge, Helen J; Mandalia, Reshma; Motevalli, Majid; Utley, James H P; Wyatt, Peter B; Chemical communications (Cambridge, England)  (2004) 412–413; doi:10.1039/b313995f

data_7102468
_publ_section_title
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 Generation of strong, homochiral bases by electrochemical reduction of
 phenazine derivatives.
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_journal_issue                   4
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              412
_journal_page_last               413
_journal_paper_doi               10.1039/b313995f
_journal_year                    2004
_chemical_formula_sum            'C24 H28 N2 O4'
_chemical_formula_weight         408.48
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   13.3625(4)
_cell_length_b                   16.2726(5)
_cell_length_c                   19.4817(7)
_cell_measurement_temperature    120(2)
_cell_volume                     4236.2(2)
_computing_cell_refinement       'DENZO and COLLECT'
_computing_data_collection
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DENZO (Otwinowski and Minor, 1997
COLLECT (Hooft, 1998)
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_computing_data_reduction        'DENZO and COLLECT'
_computing_molecular_graphics    'ORTEP3 for Windows - Farrugia, L. J. (1997)'
_computing_publication_material  'WINGX(L.J. Farrugia, 1999'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 7.39
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.983
_diffrn_measurement_device_type  'Enraf Nonius KappaCCD area detector'
_diffrn_measurement_method       'Phi and Omega scans to fill Ewald sphere'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enraf Nonius FR591 rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0818
_diffrn_reflns_av_sigmaI/netI    0.1452
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            20608
_diffrn_reflns_theta_full        27.09
_diffrn_reflns_theta_max         27.09
_diffrn_reflns_theta_min         2.93
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  1.00569
_exptl_absorpt_correction_T_min  0.96852
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
Using multiple and symmetry-related data measurements via the program
SORTAV
See R.H. Blessing, Acta Crysta (1995), A51, 33-38
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.281
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             1744
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.959
_refine_diff_density_min         -0.432
_refine_diff_density_rms         0.066
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00
_refine_ls_extinction_coef       0.0065(11)
_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_ref   1.010
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     544
_refine_ls_number_reflns         8918
_refine_ls_number_restraints     80
_refine_ls_restrained_S_all      1.019
_refine_ls_R_factor_all          0.1842
_refine_ls_R_factor_gt           0.0844
_refine_ls_shift/su_max          0.053
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1164P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1970
_refine_ls_wR_factor_ref         0.2376
_reflns_number_gt                4506
_reflns_number_total             8918
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b313995f.txt
_cod_data_source_block           ama-1535
_cod_depositor_comments
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The following automatic conversions were performed:
'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' 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:

'_exptl_crystal_density_meas' value 'noit 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:

'_symmetry_cell_setting' tag value 'Orthrohmbic' was replaced with
'orthorhombic' value as specified in the replacement file
'/home/robertas/cod-tools/perl-scripts/inputs/replacement_values.lst'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
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_cod_original_sg_symbol_H-M      P212121
_cod_database_code               7102468