Spectroscopy and photophysics of flavin-related compounds: 3-benzyl-lumiflavin.
Insińska-Rak, Malgorzata; Sikorska, Ewa; Herance, Jose R.; Bourdelande, Jose L.; Khmelinskii, Igor V.; Kubicki, Maciej; Prukała, Wiesław; Machado, Isabel F.; Komasa, Anna; Ferreira, Luis F. V.; Sikorski, Marek; Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology 4 (2005) 463–468; doi:10.1039/b503898g

data_1516245
_publ_section_title
;
 Spectroscopy and photophysics of flavin-related compounds:
 3-benzyl-lumiflavin.
;
_journal_issue                   6
_journal_name_full
'Photochemical &amp; photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology'
_journal_page_first              463
_journal_page_last               468
_journal_paper_doi               10.1039/b503898g
_journal_volume                  4
_journal_year                    2005
_chemical_formula_moiety         'C20 H18 N4 O2'
_chemical_formula_sum            'C20 H18 N4 O2'
_chemical_formula_weight         346.38
_chemical_name_common            3-benzyllumiflavin
_chemical_name_systematic
;
3-benzyl-5,7,8-trimethyl-isoalloxazine
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.570(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.1730(4)
_cell_length_b                   10.2690(5)
_cell_length_c                   22.5120(11)
_cell_measurement_reflns_used    6610
_cell_measurement_temperature    290(2)
_cell_measurement_theta_max      24
_cell_measurement_theta_min      3
_cell_volume                     1658.14(15)
_computing_cell_refinement       'CrysAlisCCD v.169 (Oxford Diffraction, 2002a)'
_computing_data_collection       'CrysAlisCCD v.169 (Oxford Diffraction, 2002a)'
_computing_data_reduction        'CrysAlisRed v.169 (Oxford Diffraction, 2002b)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.914
_diffrn_measurement_device_type  'KUMA KM4CCD four-circle diffractometer'
_diffrn_measurement_method       '\w scan'
_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  0.0310
_diffrn_reflns_av_sigmaI/netI    0.0310
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            15642
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         29.79
_diffrn_reflns_theta_min         2.84
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            pale-orange
_exptl_crystal_density_diffrn    1.388
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             728
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.247
_refine_diff_density_min         -0.152
_refine_diff_density_rms         0.038
_refine_ls_extinction_coef       0.0072(15)
_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   1.040
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     308
_refine_ls_number_reflns         4336
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0832
_refine_ls_R_factor_gt           0.0469
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0750P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1182
_refine_ls_wR_factor_ref         0.1349
_reflns_number_gt                2844
_reflns_number_total             4336
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b503898g.txt
_cod_data_source_block           1
_cod_original_sg_symbol_H-M      P2~1~/c
_cod_database_code               1516245