Diels–Alder reactions of 3,6-disubstituted 1,2,4,5-tetrazines. Synthesis and X-ray crystal structures of diazafluoranthene derivatives
Rahanyan, Nelli; Linden, Anthony; Baldridge, Kim K.; Siegel, Jay S.; Organic & Biomolecular Chemistry 7 (2009) 2082–2092; doi:10.1039/b820551e

data_7150614
_publ_section_title
;
 Diels--Alder reactions of 3,6-disubstituted 1,2,4,5-tetrazines.
 Synthesis and X-ray crystal structures of diazafluoranthene
 derivatives
;
_journal_issue                   10
_journal_name_full               'Organic &amp; Biomolecular Chemistry'
_journal_page_first              2082
_journal_page_last               2092
_journal_paper_doi               10.1039/b820551e
_journal_volume                  7
_journal_year                    2009
_chemical_formula_moiety         'C24 H16 N2 O2'
_chemical_formula_sum            'C24 H16 N2 O2'
_chemical_formula_weight         364.40
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             08-04-29
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 100.864(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.3569(5)
_cell_length_b                   9.9526(6)
_cell_length_c                   21.8278(9)
_cell_measurement_reflns_used    3208
_cell_measurement_temperature    160(1)
_cell_measurement_theta_max      25.0
_cell_measurement_theta_min      2.0
_cell_volume                     1782.94(17)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 2000)'
_computing_data_reduction
'DENZO-SMN and SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'ORTEPII (Johnson, 1976)'
_computing_publication_material  'SHELXL97 and PLATON (Spek, 2006)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      160(1)
_diffrn_detector                 '65 mm CCD camera on \k goniostat'
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Nonius KappaCCD area-detector diffractometer'
_diffrn_measurement_method       '\w scans with \k offsets'
_diffrn_radiation_monochromator  'horizontally mounted graphite crystal'
_diffrn_radiation_source         'Nonius FR590 sealed tube generator'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0950
_diffrn_reflns_av_sigmaI/netI    0.0690
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            21964
_diffrn_reflns_theta_full        24.96
_diffrn_reflns_theta_max         24.96
_diffrn_reflns_theta_min         2.05
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.0875
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.357
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             760
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.176
_refine_diff_density_min         -0.176
_refine_diff_density_rms         0.039
_refine_ls_extinction_coef       0.015(4)
_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   1.046
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     257
_refine_ls_number_reflns         3189
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.1263
_refine_ls_R_factor_gt           0.0565
_refine_ls_shift/su_max          1.336
_refine_ls_shift/su_mean         0.221
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0745P)^2^+0.3825P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1336
_refine_ls_wR_factor_ref         0.1775
_reflns_number_gt                1544
_reflns_number_total             3189
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            b820551e.txt
_cod_data_source_block           SG0806
_cod_database_code               7150614