Preparation and Diels-Alder Chemistry of 4-Vinylimidazoles
Carl J. Lovely; Hongwang Du; Rasapalli Sivappa; Manojkumar R. Bhandari; Yong He; H. V. Rasika Dias; Journal of Organic Chemistry 72 (2007) 3741–3749; doi:10.1021/jo0626008

data_4022835
_publ_contact_author_address
;Department of Chemistry and Biochemistry
The University of Texas at Arlington
Arlington, Texas 76019-0065, USA
;
_publ_contact_author_email       dias@uta.edu
_publ_contact_author_fax         817-272-3808
_publ_contact_author_name        'Prof. H. V. R. Dias'
_publ_contact_author_phone       817-272-3813
_publ_section_title
;
 Preparation and Diels-Alder Chemistry of 4-Vinylimidazoles
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              3741
_journal_page_last               3749
_journal_paper_doi               10.1021/jo0626008
_journal_volume                  72
_journal_year                    2007
_chemical_formula_sum            'C26 H22 N4 O4'
_chemical_formula_weight         454.48
_chemical_name_common            Compound-51
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 113.381(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.5202(18)
_cell_length_b                   16.7045(19)
_cell_length_c                   11.4429(17)
_cell_measurement_reflns_used    44
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      12.45
_cell_measurement_theta_min      3.35
_cell_volume                     2196.7(5)
_computing_cell_refinement       'Siemens XSCANS'
_computing_data_collection       'Siemens XSCANS'
_computing_data_reduction        'Siemens SHELXTL'
_computing_molecular_graphics    'Siemens SHELXTL'
_computing_publication_material  'Siemens SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_method       '\w scans'
_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  0.0246
_diffrn_reflns_av_sigmaI/netI    0.0313
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -1
_diffrn_reflns_number            3657
_diffrn_reflns_theta_full        22.50
_diffrn_reflns_theta_max         22.50
_diffrn_reflns_theta_min         2.15
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.095
_exptl_absorpt_correction_T_max  0.9576
_exptl_absorpt_correction_T_min  0.9435
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.374
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rods
_exptl_crystal_F_000             952
_exptl_crystal_size_max          0.62
_exptl_crystal_size_mid          0.55
_exptl_crystal_size_min          0.46
_refine_diff_density_max         0.158
_refine_diff_density_min         -0.145
_refine_diff_density_rms         0.030
_refine_ls_extinction_coef       0.0097(9)
_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   1.026
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     309
_refine_ls_number_reflns         2877
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0453
_refine_ls_R_factor_gt           0.0352
_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^)+(0.0366P)^2^+0.6402P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0859
_refine_ls_wR_factor_ref         0.0917
_reflns_number_gt                2397
_reflns_number_total             2877
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo0626008si20070226_025108_5.cif
_cod_data_source_block           rd269a
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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 21/c'
_cod_database_code               4022835