Synthesis, Characterization, and Cycloaddition Reactivity of a Monocyclic Aromatic 1,2,3,5-Tetrazine.
Wu, Zhi-Chen; Boger, Dale L.; Journal of the American Chemical Society 141 (2019) 16388–16397; doi:10.1021/jacs.9b07744

data_4127688
_publ_section_title
;
 Synthesis, Characterization, and Cycloaddition Reactivity of a Monocyclic
 Aromatic 1,2,3,5-Tetrazine.
;
_journal_issue                   41
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              16388
_journal_page_last               16397
_journal_paper_doi               10.1021/jacs.9b07744
_journal_volume                  141
_journal_year                    2019
_chemical_formula_moiety         'C19 H20 N4 O2'
_chemical_formula_sum            'C19 H20 N4 O2'
_chemical_formula_weight         336.39
_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'
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2018-11-15
_audit_creation_method
;
Olex2 1.2-beta
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_cell_angle_alpha                90
_cell_angle_beta                 104.338(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   13.3231(7)
_cell_length_b                   9.9116(6)
_cell_length_c                   14.2356(7)
_cell_measurement_reflns_used    2598
_cell_measurement_temperature    100
_cell_measurement_theta_max      25.389
_cell_measurement_theta_min      2.413
_cell_volume                     1821.30(17)
_computing_cell_refinement       'SAINT V8.38A (?, 2016)'
_computing_data_collection       'APEX2 v2014.11-0 (Bruker, 2014)'
_computing_data_reduction        'SAINT V8.38A (?, 2016)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      100.0
_diffrn_detector                 'Bruker APEX-II CCD'
_diffrn_detector_area_resol_mean 7.9
_diffrn_detector_type            'CCD Area Detector'
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device       'Kappa Four-Circle Diffractometer'
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0437
_diffrn_reflns_av_unetI/netI     0.0536
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.994
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            14723
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.994
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.301
_diffrn_reflns_theta_min         2.954
_diffrn_source                   'sealed tube'
_diffrn_source_type              fine-focus
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.6822
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.0472 before and 0.0420 after correction. The Ratio of minimum to maximum transmission is 0.9148. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            yellow
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.227
_exptl_crystal_description       plate
_exptl_crystal_F_000             712
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.334
_refine_diff_density_min         -0.341
_refine_diff_density_rms         0.048
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.013
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     229
_refine_ls_number_reflns         4497
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.013
_refine_ls_R_factor_all          0.0793
_refine_ls_R_factor_gt           0.0474
_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^)+(0.0453P)^2^+0.4394P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0984
_refine_ls_wR_factor_ref         0.1116
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3136
_reflns_number_total             4497
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja9b07744_si_004.cif
_cod_data_source_block           boger95_0m_a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_diffrn_radiation_probe' value 'X-ray' changed to 'x-ray' according
to
/home/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 
;
_cod_database_code               4127688
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.992
_shelx_estimated_absorpt_t_min   0.980
_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:
 N1(H1), C14(H14), C3(H3), C7(H7), C10(H10), C6(H6), C4(H4), C5(H5), C11(H11),
 C13(H13), C12(H12)
2.b Idealised Me refined as rotating group:
 C18(H18A,H18B,H18C), C17(H17A,H17B,H17C), C19(H19A,H19B,H19C)
;
_shelx_res_checksum              59154
_shelx_hkl_checksum              40055
_olex2_submission_special_instructions 'No special instructions were received'