1,3-Dipolar character of 2-vinyl quinazoline 3-oxides; first and second generation cycloaddition products.
Heaney, Frances; Lawless, Elaine; Mahon, Mary; McArdle, Patrick; Cunningham, Desmond; Organic & biomolecular chemistry 4 (2006) 2408–2416; doi:10.1039/b602423h

data_7151212
_publ_section_title
;
 1,3-Dipolar character of 2-vinyl quinazoline 3-oxides; first and
 second generation cycloaddition products.
;
_journal_issue                   12
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              2408
_journal_page_last               2416
_journal_paper_doi               10.1039/b602423h
_journal_volume                  4
_journal_year                    2006
_chemical_formula_sum            'C20 H18 N2 O2'
_chemical_formula_weight         318.36
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                73.159(1)
_cell_angle_beta                 73.945(1)
_cell_angle_gamma                70.568(1)
_cell_formula_units_Z            2
_cell_length_a                   7.4920(1)
_cell_length_b                   9.0450(2)
_cell_length_c                   13.5630(4)
_cell_measurement_reflns_used    11569
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      2.910
_cell_volume                     812.88(3)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_reduction        'Denzo and Scalepack (otwinowski & Minor, 1997'
_computing_molecular_graphics    'ORTEX (P.McArdle, 1995)'
_computing_publication_material  'SHELXL-97/2 (Sheldrick,1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.980
_diffrn_measured_fraction_theta_max 0.980
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       KappaCCD
_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  0.0283
_diffrn_reflns_av_sigmaI/netI    0.0313
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            14444
_diffrn_reflns_theta_full        27.57
_diffrn_reflns_theta_max         27.57
_diffrn_reflns_theta_min         3.62
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.9587
_exptl_absorpt_correction_T_min  0.9587
_exptl_absorpt_correction_type   none
_exptl_absorpt_process_details
;
?
;
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.301
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             336
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.50
_exptl_crystal_size_min          0.50
_refine_diff_density_max         0.226
_refine_diff_density_min         -0.192
_refine_diff_density_rms         0.035
_refine_ls_extinction_coef       0.043(13)
_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   1.031
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     220
_refine_ls_number_reflns         3688
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0488
_refine_ls_R_factor_gt           0.0381
_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^)+(0.0439P)^2^+0.2083P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0922
_refine_ls_wR_factor_ref         0.0982
_reflns_number_gt                3052
_reflns_number_total             3688
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b602423h.txt
_cod_data_source_block           c:\x-ray\helix\h04pma2\maxus\h04pma2
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'None' changed to
'none' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7151212