A thermo-responsive structural switch and colossal anisotropic thermal expansion in a chiral organic solid.
Janiak, Agnieszka; Esterhuysen, Catharine; Barbour, Leonard J.; Chemical communications (Cambridge, England) 54 (2018) 3727–3730; doi:10.1039/c8cc00952j

data_7121409
_publ_section_title
;
 A thermo-responsive structural switch and colossal anisotropic thermal
 expansion in a chiral organic solid.
;
_journal_issue                   30
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              3727
_journal_page_last               3730
_journal_paper_doi               10.1039/c8cc00952j
_journal_volume                  54
_journal_year                    2018
_chemical_absolute_configuration rm
_chemical_formula_moiety         'C42 H48 N6'
_chemical_formula_sum            'C42 H48 N6'
_chemical_formula_weight         636.86
_space_group_crystal_system      monoclinic
_space_group_IT_number           5
_space_group_name_Hall           'C 2y'
_space_group_name_H-M_alt        'C 1 2 1'
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2017-09-07 deposited with the CCDC.
2018-03-21 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 100.532(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   31.3940(9)
_cell_length_b                   5.3361(2)
_cell_length_c                   23.9306(7)
_cell_measurement_reflns_used    6946
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      75.2590
_cell_measurement_theta_min      2.8350
_cell_volume                     3941.4(2)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      295(2)
_diffrn_detector_area_resol_mean 10.5357
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.976
_diffrn_measurement_device_type  'SuperNova, Single source at offset, Atlas'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0240
_diffrn_reflns_av_unetI/netI     0.0284
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.976
_diffrn_reflns_limit_h_max       38
_diffrn_reflns_limit_h_min       -34
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            17515
_diffrn_reflns_point_group_measured_fraction_full 0.960
_diffrn_reflns_point_group_measured_fraction_max 0.927
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         75.694
_diffrn_reflns_theta_min         2.863
_diffrn_source                   'micro-focus sealed X-ray tube'
_exptl_absorpt_coefficient_mu    0.492
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.69062
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.46 (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.073
_exptl_crystal_description       plate
_exptl_crystal_F_000             1368
_exptl_crystal_size_max          0.480
_exptl_crystal_size_mid          0.160
_exptl_crystal_size_min          0.060
_refine_diff_density_max         0.114
_refine_diff_density_min         -0.130
_refine_diff_density_rms         0.029
_refine_ls_abs_structure_details
;
 Flack x determined using 2218 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.2(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     433
_refine_ls_number_reflns         7597
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.034
_refine_ls_R_factor_all          0.0538
_refine_ls_R_factor_gt           0.0449
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0783P)^2^+0.0550P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1238
_refine_ls_wR_factor_ref         0.1328
_reflns_Friedel_coverage         0.710
_reflns_Friedel_fraction_full    0.914
_reflns_Friedel_fraction_max     0.866
_reflns_number_gt                6259
_reflns_number_total             7597
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8cc00952j2.cif
_cod_data_source_block           FormI_295K
_cod_depositor_comments
'Adding full bibliography for 7121409--7121413.cif.'
_cod_database_code               7121409
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.798
_shelx_estimated_absorpt_t_max   0.971
_shelx_res_checksum              37107
_shelx_hkl_checksum              6601