Molecular dynamic staircases: all-carbon axial chiral "Geländer" structures.
Mannancherry, Rajesh; Rickhaus, Michel; Häussinger, Daniel; Prescimone, Alessandro; Mayor, Marcel; Chemical science 9 (2018) 5758–5766; doi:10.1039/c8sc01707g

data_1549511
_publ_section_title
;
 Molecular dynamic staircases: all-carbon axial chiral
 &quot;Gel\"ander&quot; structures.
;
_journal_issue                   26
_journal_name_full               'Chemical science'
_journal_page_first              5758
_journal_page_last               5766
_journal_paper_doi               10.1039/c8sc01707g
_journal_volume                  9
_journal_year                    2018
_chemical_compound_source        'Rajesh Mannancherry'
_chemical_formula_moiety         'C40 H30'
_chemical_formula_sum            'C40 H30'
_chemical_formula_weight         510.68
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_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             2017-06-29
_audit_creation_method           CRYSTALS_ver_14.61_build_6236
_audit_update_record
;
2017-12-16 deposited with the CCDC.
2018-05-31 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 94.249(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.5388(5)
_cell_length_b                   14.2697(8)
_cell_length_c                   22.0284(14)
_cell_measurement_reflns_used    9920
_cell_measurement_temperature    123
_cell_measurement_theta_max      69
_cell_measurement_theta_min      4
_cell_volume                     2676.7(3)
_computing_cell_refinement       'Apex2 (Bruker AXS, 2006)'
_computing_data_collection       'Apex2 (Bruker AXS, 2006)'
_computing_data_reduction        'Apex2 (Bruker AXS, 2006)'
_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      123
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.983
_diffrn_measurement_device       Area
_diffrn_measurement_device_type  'Bruker Kappa Apex2'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.036
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            38356
_diffrn_reflns_theta_full        68.000
_diffrn_reflns_theta_max         68.977
_diffrn_reflns_theta_min         5.081
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.540
_exptl_absorpt_correction_T_max  0.97
_exptl_absorpt_correction_T_min  0.88
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Siemens, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.267
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1080
_exptl_crystal_recrystallization_method
; 
DCM/Hexane/Isopropanol 
;
_exptl_crystal_size_max          0.100
_exptl_crystal_size_mid          0.080
_exptl_crystal_size_min          0.050
_refine_diff_density_max         0.22
_refine_diff_density_min         -0.22
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   0.9378
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     361
_refine_ls_number_reflns         4875
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0412
_refine_ls_R_factor_gt           0.0352
_refine_ls_shift/su_max          0.0008364
_refine_ls_shift/su_mean         0.0000774
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982) 
 [weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)] 
 where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax 
 Method = Robust Weighting (Prince, 1982) 
 W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^ 
 A~i~ are: 
 1.77 2.20 0.529 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0781
_refine_ls_wR_factor_gt          0.0760
_refine_ls_wR_factor_ref         0.0780
_reflns_limit_h_max              10
_reflns_limit_h_min              -10
_reflns_limit_k_max              17
_reflns_limit_k_min              0
_reflns_limit_l_max              26
_reflns_limit_l_min              0
_reflns_number_gt                4262
_reflns_number_total             4895
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   0.00
_oxford_diffrn_Wilson_scale      0.00
_oxford_refine_ls_r_factor_ref   0.0411
_oxford_refine_ls_scale          0.15862(5)
_oxford_reflns_number_all        4877
_oxford_reflns_threshold_expression_ref I>-3.0\s(I)
_oxford_structure_analysis_title 'RM315_CD_123K_0m in P2(1)/c'
_cod_data_source_file            c8sc01707g2.cif
_cod_data_source_block           RM315_CD_123K
_cod_depositor_comments
;
The following automatic conversions were performed:

'_atom_sites_solution_primary' value 'Other' changed to 'other'
according to
/home/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 4973 2017-02-22 13:04:09Z antanas 

 Adding full bibliography for 1549510--1549511.cif.
;
_cod_original_sg_symbol_H-M      'P 21/c '
_cod_database_code               1549511