Twisting the ethano-Tröger's base: the bisamide.
Pereira, Raul; Pfeifer, Lukas; Fournier, Jean; Gouverneur, Véronique; Cvengroš, Ján; Organic & biomolecular chemistry 15 (2017) 628–633; doi:10.1039/c6ob02359b

data_7155405
_publ_section_title
;
 Twisting the ethano-Tr\"oger's base: the bisamide.
;
_journal_issue                   3
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              628
_journal_page_last               633
_journal_paper_doi               10.1039/c6ob02359b
_journal_volume                  15
_journal_year                    2017
_chemical_formula_moiety         'C18 H20 N2 O2'
_chemical_formula_sum            'C18 H20 N2 O2'
_chemical_formula_weight         296.37
_chemical_melting_point          379.5(15)
_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   difmap
_atom_sites_solution_primary     other
_audit_creation_date             2015-04-17
_audit_creation_method           CRYSTALS_ver_14.43
_audit_update_record
;
2015-12-11 deposited with the CCDC.
2016-12-06 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 97.9329(17)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.3292(1)
_cell_length_b                   19.7192(3)
_cell_length_c                   10.6272(2)
_cell_measurement_reflns_used    14103
_cell_measurement_temperature    150
_cell_measurement_theta_max      76
_cell_measurement_theta_min      4
_cell_volume                     1521.21(4)
_computing_cell_refinement       'CrysAlis, (Oxford Diffraction, 2002)'
_computing_data_collection       'SuperNova, (Oxford Diffraction, 2010)'
_computing_data_reduction        'CrysAlis, (Oxford Diffraction, 2002)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'Superflip (Palatinus & Chapuis, 2007)'
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device       Area
_diffrn_measurement_device_type  'Oxford Diffraction SuperNova'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54180
_diffrn_reflns_av_R_equivalents  0.024
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            31065
_diffrn_reflns_theta_full        76.540
_diffrn_reflns_theta_max         76.540
_diffrn_reflns_theta_min         4.484
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.680
_exptl_absorpt_correction_T_max  0.90
_exptl_absorpt_correction_T_min  0.79
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrysAlis, (Oxford Diffraction, 2002)'
_exptl_crystal_colour            clear_pale_colourless
_exptl_crystal_density_diffrn    1.294
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             632
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.43
_refine_diff_density_min         -0.29
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   0.9886
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     199
_refine_ls_number_reflns         3182
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0557
_refine_ls_R_factor_gt           0.0538
_refine_ls_shift/su_max          0.0002511
_refine_ls_shift/su_mean         0.0000383
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method= Modified Sheldrick 
 w=1/[\s^2^(F^2^) + ( 0.06P)^2^ + 1.35P] 
 ,where P=(max(Fo^2^,0) + 2Fc^2^)/3 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1376
_refine_ls_wR_factor_gt          0.1358
_refine_ls_wR_factor_ref         0.1376
_reflns_limit_h_max              9
_reflns_limit_h_min              -9
_reflns_limit_k_max              24
_reflns_limit_k_min              0
_reflns_limit_l_max              13
_reflns_limit_l_min              0
_reflns_number_gt                3008
_reflns_number_total             3194
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   2.76
_oxford_diffrn_Wilson_scale      0.02
_oxford_refine_ls_r_factor_ref   0.0557
_oxford_refine_ls_scale          6.5(2)
_oxford_reflns_number_all        3182
_oxford_reflns_threshold_expression_ref I>-3.0\s(I)
_oxford_structure_analysis_title 045lp14
_iucr_refine_instructions_details_constraints
;
BLOCK SCALE X'S, U'S 
RIDE C   (   6,X'S) H   (  61,X'S) 
RIDE C   (   8,X'S) H   (  83,X'S) H   (  82,X'S) H   (  81,X'S) 
RIDE C   (   9,X'S) H   (  91,X'S) 
RIDE C   (  10,X'S) H   ( 101,X'S) 
RIDE C   (  11,X'S) H   ( 111,X'S) H   ( 112,X'S) 
RIDE O   (  12,X'S) H   ( 121,X'S) 
RIDE C   (  13,X'S) H   ( 131,X'S) H   ( 132,X'S) 
RIDE C   (  14,X'S) H   ( 142,X'S) H   ( 141,X'S) 
RIDE N   (  15,X'S) H   ( 151,X'S) 
RIDE C   (  18,X'S) H   ( 181,X'S) 
RIDE C   (  20,X'S) H   ( 201,X'S) 
RIDE C   (  21,X'S) H   ( 211,X'S) 
RIDE C   (  22,X'S) H   ( 223,X'S) H   ( 222,X'S) H   ( 221,X'S) 
END                                                                             
;
_iucr_refine_instructions_details_restraints
;
NO 
REM   HREST   START (DO NOT REMOVE THIS LINE) 
REM   HREST   END (DO NOT REMOVE THIS LINE) 
END                                                                             
;
_cod_data_source_file            c6ob02359b2.cif
_cod_data_source_block           7a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value '378-381 K' was changed to
'379.5(15)' - the average value was taken and precision was
estimated.

'_atom_sites_solution_primary' value 'Other' changed to 'other'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 

 Adding full bibliography for 7155403--7155407.cif.
;
_cod_original_sg_symbol_H-M      'P 21/c '
_cod_database_code               7155405