Structural elaboration of dicyanopyrazine: towards push–pull molecules with tailored photoredox activity
Hloušková, Zuzana; Klikar, Milan; Pytela, Oldřich; Almonasy, Numan; R°užička, Aleš; Jandová, Veronika; Bureš, Filip; RSC Advances 9 (2019) 23797–; doi:10.1039/C9RA04731J

data_7233291
_publ_section_title
;
 Structural elaboration of dicyanopyrazine: towards push--pull molecules
 with tailored photoredox activity
;
_journal_issue                   41
_journal_name_full               'RSC Advances'
_journal_page_first              23797
_journal_paper_doi               10.1039/C9RA04731J
_journal_volume                  9
_journal_year                    2019
_chemical_formula_moiety         'C8 H6 N4 O2'
_chemical_formula_sum            'C8 H6 N4 O2'
_chemical_formula_weight         190.17
_space_group_crystal_system      orthorhombic
_space_group_IT_number           62
_space_group_name_Hall           '-P 2ac 2n'
_space_group_name_H-M_alt        'P n m a'
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           'APEX3 v2016.5-0'
_audit_update_record
;
2019-02-16 deposited with the CCDC.    2019-07-15 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.3323(7)
_cell_length_b                   14.8768(11)
_cell_length_c                   6.3126(5)
_cell_measurement_reflns_used    8519
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      1
_cell_volume                     876.41(12)
_computing_cell_refinement       'APEX3 v2016.5-0 (Bruker AXS)'
_computing_data_collection       'Bruker Instrument Service vV6.2.3'
_computing_data_reduction        'SAINT V8.37A (Bruker AXS Inc., 2015)'
_computing_molecular_graphics    'Platon (Spek, 2009)'
_computing_publication_material  'Platon (Spek, 2009)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'XT, VERSION 2014/5'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 10.4167
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker D8 - Venture'
_diffrn_measurement_method       '\f and \w scans to fill the Ewald sphere'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0557
_diffrn_reflns_av_unetI/netI     0.0291
_diffrn_reflns_Laue_measured_fraction_full 0.995
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            7842
_diffrn_reflns_point_group_measured_fraction_full 0.995
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.513
_diffrn_reflns_theta_min         3.506
_diffrn_source                   'sealed X-ray tube'
_exptl_absorpt_coefficient_mu    0.109
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6553
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 - Bruker AXS area detector
scaling and absorption correction
;
_exptl_crystal_colour            'translucent colourless'
_exptl_crystal_density_diffrn    1.441
_exptl_crystal_description       block
_exptl_crystal_F_000             392
_exptl_crystal_size_max          0.47
_exptl_crystal_size_mid          0.34
_exptl_crystal_size_min          0.21
_refine_diff_density_max         0.310
_refine_diff_density_min         -0.235
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.073
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     65
_refine_ls_number_reflns         1043
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.073
_refine_ls_R_factor_all          0.0606
_refine_ls_R_factor_gt           0.0431
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0580P)^2^+0.1812P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1016
_refine_ls_wR_factor_ref         0.1093
_reflns_Friedel_coverage         0.000
_reflns_number_gt                826
_reflns_number_total             1043
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9ra04731j2.cif
_cod_data_source_block           7
_cod_database_code               7233291
_exptl_absorpt_special_details
;
The ratio of minimum to maximum
apparent transmission was 0.879
;
_shelx_res_checksum              84855