Conformational polymorphism in a Schiff-base macrocyclic organic ligand: an experimental and theoretical study
Lo Presti, Leonardo; Soave, Raffaella; Longhi, Mariangela; Ortoleva, Emanuele; Acta Crystallographica Section B 66 (2010) 527–543; doi:10.1107/S0108768110029514

data_2017779
_publ_section_title
;
 Conformational polymorphism in a Schiff-base macrocyclic organic ligand:
 an experimental and theoretical study
;
_journal_coeditor_code           PS5007
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              527
_journal_page_last               543
_journal_paper_doi               10.1107/S0108768110029514
_journal_volume                  66
_journal_year                    2010
_chemical_formula_moiety         'C24 H30 N6'
_chemical_formula_sum            'C24 H30 N6'
_chemical_formula_weight         402.54
_chemical_melting_point          460.65
_chemical_name_systematic
;
3,6,9,17,20,23-hexa-azapentacyclo(23.3.1.1^11,15^.0^2,6^.0^16,20^)triaconta-1
(29),9,11,13,15(30),23,25,27-octaene
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                87.182(2)
_cell_angle_beta                 81.257(2)
_cell_angle_gamma                82.062(2)
_cell_formula_units_Z            3
_cell_length_a                   9.6970(10)
_cell_length_b                   12.2426(12)
_cell_length_c                   13.9365(14)
_cell_measurement_reflns_used    2864
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      19.420
_cell_measurement_theta_min      2.420
_cell_volume                     1618.9(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker AXS Smart'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1087
_diffrn_reflns_av_sigmaI/netI    0.0769
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            48844
_diffrn_reflns_theta_full        27.52
_diffrn_reflns_theta_max         27.52
_diffrn_reflns_theta_min         1.48
_exptl_absorpt_coefficient_mu    0.076
_exptl_absorpt_correction_T_max  0.943
_exptl_absorpt_correction_T_min  0.936
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS-2007/4
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.239
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             648
_exptl_crystal_size_max          0.225
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.050
_refine_diff_density_max         0.299
_refine_diff_density_min         -0.211
_refine_ls_extinction_coef       0.0039(12)
_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     419
_refine_ls_number_reflns         7448
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.010
_refine_ls_R_factor_all          0.1391
_refine_ls_R_factor_gt           0.0535
_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^)+(0.0746P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1138
_refine_ls_wR_factor_ref         0.1476
_reflns_number_gt                3646
_reflns_number_total             7448
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ps5007.cif
_cod_data_source_block           dienII
_cod_original_sg_symbol_Hall     -P1
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               2017779