Ethyl 3-cyano-7-methylpyrazolo[1,5-<i>a</i>]pyrimidine-6-carboxylate
Li-Rong Wen; Shu-wen Wang; Ming Li; Wei-si Guo; Acta Crystallographica Section E 61 (2005) o1459–o1460; doi:10.1107/S1600536805012353

data_2205682
_publ_section_title
;
 Ethyl 3-cyano-7-methylpyrazolo[1,5-<i>a</i>]pyrimidine-6-carboxylate
;
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1459
_journal_page_last               o1460
_journal_paper_doi               10.1107/S1600536805012353
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C11 H10 N4 O2'
_chemical_formula_moiety         'C11 H10 N4 O2'
_chemical_formula_sum            'C11 H10 N4 O2'
_chemical_formula_weight         230.23
_chemical_name_systematic
;
Ethyl 3-cyano-7-methylpyrazolo[1,5-a]pyrimidine-6-carboxylate
;
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 95.568(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.8815(11)
_cell_length_b                   16.468(3)
_cell_length_c                   9.7901(16)
_cell_measurement_reflns_used    2527
_cell_measurement_temperature    273(2)
_cell_measurement_theta_max      25.72
_cell_measurement_theta_min      2.43
_cell_volume                     1104.2(3)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Bruker, 1998)'
_computing_data_reduction        'SAINT (Bruker, 1999)'
_computing_molecular_graphics    'SHELXTL (Bruker, 1999)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      273(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEXII CCD area-detector'
_diffrn_measurement_method       '\f and \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  0.0224
_diffrn_reflns_av_sigmaI/netI    0.0201
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            5921
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.43
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.100
_exptl_absorpt_correction_T_max  0.980
_exptl_absorpt_correction_T_min  0.807
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.385
_exptl_crystal_density_meas      1.385
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             480
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.156
_refine_diff_density_min         -0.196
_refine_ls_extinction_coef       0.058(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.048
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     157
_refine_ls_number_reflns         1943
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.048
_refine_ls_R_factor_all          0.0443
_refine_ls_R_factor_gt           0.0359
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0538P)^2^+0.2206P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0992
_refine_ls_wR_factor_ref         0.1052
_reflns_number_gt                1585
_reflns_number_total             1943
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            cv6476.cif
_cod_data_source_block           I
_cod_original_sg_symbol_Hall     '-p 2ybc'
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2205682
_cod_database_fobs_code          2205682