Diethyl 4-(4,5-dihydrofuran-2-yl)-3,5-dimethyl-1-phenyl-1,4-dihydropyrazine-2,6-dicarboxylate
He, Jing-Yu; Tan, Zhi-Lin; Yan, Hong; Acta Crystallographica Section E 65 (2009) o1129–; doi:10.1107/S1600536809013749

data_2221688
_publ_section_title
;Diethyl
 4-(4,5-dihydrofuran-2-yl)-3,5-dimethyl-1-phenyl-1,4-dihydropyrazine-2,6-dicarboxylate
;
_journal_coeditor_code           HB2937
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1129
_journal_paper_doi               10.1107/S1600536809013749
_journal_volume                  65
_journal_year                    2009
_chemical_formula_iupac          'C22 H26 N2 O5'
_chemical_formula_moiety         'C22 H26 N2 O5'
_chemical_formula_sum            'C22 H26 N2 O5'
_chemical_formula_weight         398.45
_chemical_name_systematic
;
Diethyl 4-(4,5-dihydrofuran-2-yl)-3,5-dimethyl-1-phenyl-1,4-\
dihydropyrazine-2,6-dicarboxylate
;
_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                72.37(3)
_cell_angle_beta                 77.59(3)
_cell_angle_gamma                63.76(3)
_cell_formula_units_Z            2
_cell_length_a                   10.069(2)
_cell_length_b                   10.242(2)
_cell_length_c                   12.519(3)
_cell_measurement_reflns_used    7345
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.02
_cell_measurement_theta_min      2.27
_cell_volume                     1098.6(5)
_computing_cell_refinement       'RAPID-AUTO (Rigaku, 2000)'
_computing_data_collection       'RAPID-AUTO (Rigaku, 2000)'
_computing_data_reduction        'CrystalStructure (Rigaku/MSC, 2000)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 10.00
_diffrn_measured_fraction_theta_full 0.973
_diffrn_measured_fraction_theta_max 0.973
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID IP'
_diffrn_measurement_method       \w
_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  0.0451
_diffrn_reflns_av_sigmaI/netI    0.0755
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            7345
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         2.27
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.086
_exptl_absorpt_correction_T_max  0.979
_exptl_absorpt_correction_T_min  0.958
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(ABSCOR; Higashi, 1995)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.204
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             424
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.165
_refine_diff_density_min         -0.127
_refine_ls_extinction_coef       0.034(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 2008)'
_refine_ls_goodness_of_fit_ref   0.840
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     291
_refine_ls_number_reflns         3768
_refine_ls_number_restraints     52
_refine_ls_restrained_S_all      0.856
_refine_ls_R_factor_all          0.1405
_refine_ls_R_factor_gt           0.0591
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.102P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1532
_refine_ls_wR_factor_ref         0.1824
_reflns_number_gt                1555
_reflns_number_total             3768
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            hb2937.cif
_cod_data_source_block           I
_cod_original_cell_volume        1098.8(4)
_cod_database_code               2221688
_cod_database_fobs_code          2221688