Structural and Spectroscopic Study of 6,7-Dicyano-Substituted Lumazine with High Electron Affinity and Proton Acidity
Sakai, Ken-ichi; Nagahara, Kenta; Yoshii, Yuuya; Hoshino, Norihisa; Akutagawa, Tomoyuki; The Journal of Physical Chemistry A 117 (2013) 3614–; doi:10.1021/jp401528c

data_1511829
_publ_section_title
;
 Structural and Spectroscopic Study of 6,7-Dicyano-Substituted Lumazine
 with High Electron Affinity and Proton Acidity
;
_journal_issue                   17
_journal_name_full               'The Journal of Physical Chemistry A'
_journal_page_first              3614
_journal_paper_doi               10.1021/jp401528c
_journal_volume                  117
_journal_year                    2013
_chemical_formula_moiety         'C24 H37 N7 O2'
_chemical_formula_sum            'C24 H37 N7 O2'
_chemical_formula_weight         455.60
_space_group_IT_number           12
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      12
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.0000
_cell_angle_beta                 95.1121(12)
_cell_angle_gamma                90.0000
_cell_formula_units_Z            4
_cell_length_a                   19.5748(4)
_cell_length_b                   12.6306(3)
_cell_length_c                   10.3215(3)
_cell_measurement_reflns_used    4405
_cell_measurement_temperature    100
_cell_measurement_theta_max      68.17
_cell_measurement_theta_min      4.17
_cell_volume                     2541.75(11)
_computing_cell_refinement       'RAPID AUTO'
_computing_data_collection       'RAPID AUTO (Rigaku, ????)'
_computing_data_reduction        'RAPID AUTO'
_computing_molecular_graphics    'CrystalStructure 4.0'
_computing_publication_material  'CrystalStructure 4.0 (Rigaku, 2010)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR2002 (Burla, et al., 2003)'
_diffrn_ambient_temperature      100
_diffrn_detector_area_resol_mean 10.000
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54187
_diffrn_reflns_av_R_equivalents  0.0555
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            14692
_diffrn_reflns_theta_full        68.22
_diffrn_reflns_theta_max         68.22
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.630
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.190
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             984.00
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.100
_refine_diff_density_max         0.630
_refine_diff_density_min         -0.480
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.975
_refine_ls_hydrogen_treatment    mixed
_refine_ls_number_parameters     177
_refine_ls_number_reflns         2438
_refine_ls_number_restraints     0
_refine_ls_R_factor_gt           0.0762
_refine_ls_shift/su_max          0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.1502P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.2391
_reflns_number_gt                1394
_reflns_number_total             2438
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            jp401528c_si_005.cif
_cod_data_source_block           TBA-DCNLH
_cod_original_cell_volume        2541.75(9)
_cod_database_code               1511829