Predicting molecular isomerism of symmetrical and unsymmetrical N,N′-diphenyl formamidines in the solid-state: crystal structure, Hirshfeld surface analysis, pairwise interaction energy, and ΔHfusion and ΔSfusion correlations
Zamisa, Sizwe J.; Bongoza, Unathi; Omondi, Bernard; CrystEngComm 23 (2021) 4459–4474; doi:10.1039/D1CE00458A

data_7242837
_publ_section_title
;
 Predicting molecular isomerism of symmetrical and unsymmetrical
 N,N&#x2032;-diphenyl formamidines in the solid-state: crystal structure,
 Hirshfeld surface analysis, pairwise interaction energy, and \DHfusion
 and \DSfusion correlations
;
_journal_issue                   25
_journal_name_full               CrystEngComm
_journal_page_first              4459
_journal_page_last               4474
_journal_paper_doi               10.1039/D1CE00458A
_journal_volume                  23
_journal_year                    2021
_chemical_formula_moiety         'C16 H16 F2 N2'
_chemical_formula_sum            'C16 H16 F2 N2'
_chemical_formula_weight         274.31
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2020-02-19
_audit_creation_method
;
Olex2 1.3
(compiled Nov 21 2019 18:26:39 for OlexSys, GUI svn.r6003)
;
_audit_update_record
;
2020-12-03 deposited with the CCDC.	2021-05-13 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 118.9230(10)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   16.4415(4)
_cell_length_b                   11.6143(3)
_cell_length_c                   16.8425(4)
_cell_measurement_reflns_used    9602
_cell_measurement_temperature    100.0
_cell_measurement_theta_max      28.44
_cell_measurement_theta_min      3.34
_cell_volume                     2815.03(12)
_computing_cell_refinement       'COSMO (Bruker, V1.61, 2009)'
_computing_data_collection       'COSMO (Bruker, V1.61, 2009)'
_computing_data_reduction        'SAINT (Bruker)'
_computing_molecular_graphics    'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2016/6 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXS  (Sheldrick, 2008)'
_diffrn_ambient_temperature      100.0
_diffrn_detector                 'Bruker APEX2 area detector'
_diffrn_detector_area_resol_mean 7.9
_diffrn_detector_type            'CCD area detector'
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.981
_diffrn_measurement_device       'three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker SMART APEX2 area detector'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0209
_diffrn_reflns_av_unetI/netI     0.0220
_diffrn_reflns_Laue_measured_fraction_full 0.992
_diffrn_reflns_Laue_measured_fraction_max 0.981
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            23599
_diffrn_reflns_point_group_measured_fraction_full 0.992
_diffrn_reflns_point_group_measured_fraction_max 0.981
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.450
_diffrn_reflns_theta_min         2.232
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_type              'sealed X-ray tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.096
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.7011
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2008/1 (Bruker,2008) was used for absorption correction. wR2(int) was 0.0519 before and 0.0338 after correction. The Ratio of minimum to maximum transmission is 0.9402. The \l/2 correction factor is 0.0015.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.294
_exptl_crystal_description       needle
_exptl_crystal_F_000             1152
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.341
_refine_diff_density_min         -0.330
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     367
_refine_ls_number_reflns         6983
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0487
_refine_ls_R_factor_gt           0.0384
_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^)+(0.0499P)^2^+0.9426P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0982
_refine_ls_wR_factor_ref         0.1055
_reflns_Friedel_coverage         0.000
_reflns_number_gt                5776
_reflns_number_total             6983
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1ce00458a2.cif
_cod_data_source_block           8
_cod_depositor_comments
'Adding full bibliography for 7242837--7242841.cif.'
_cod_database_code               7242837
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.988
_shelx_estimated_absorpt_t_min   0.970
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All N(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Aromatic/amide H refined with riding coordinates:
 N2A(H2A), C3A(H3A), C4A(H4A), C5A(H5A), C7A(H7A), C10A(H10A), C12A(H12A),
 N2B(H2B), C3B(H3B), C4B(H4B), C5B(H5B), C7B(H7B), C10B(H10B), C12B(H12B)
2.b Idealised Me refined as rotating group:
 C14A(H14A,H14B,H14C), C15A(H15A,H15B,H15C), C16A(H16A,H16B,H16C), C14B(H14D,
 H14E,H14F), C15B(H15D,H15E,H15F), C16B(H16D,H16E,H16F)
;
_shelx_res_checksum              124
_shelx_hkl_checksum              64516
_olex2_submission_special_instructions 'No special instructions were received'