The regioisomeric 1<i>H</i>(2<i>H</i>)-pyrazolo[3,4-<i>d</i>]pyrimidine <i>N</i>^1^- and <i>N</i>^2^-(2'-deoxy-β-<small>D</small>-ribofuranosides)
He, Junlin; Seela, Frank; Eickmeier, Henning; Reuter, Hans; Acta Crystallographica Section C 58 (2002) o593–o595; doi:10.1107/S0108270102014944

data_2012995
_publ_section_title
;
 The regioisomeric
 1<i>H</i>(2<i>H</i>)-pyrazolo[3,4-<i>d</i>]pyrimidine <i>N</i>^1^- and
 <i>N</i>^2^-(2'-deoxy-\b-<small>D</small>-ribofuranosides)
;
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o593
_journal_page_last               o595
_journal_paper_doi               10.1107/S0108270102014944
_journal_volume                  58
_journal_year                    2002
_chemical_formula_iupac          'C10 H12 N4 O3'
_chemical_formula_moiety         'C10 H12 N4 O3'
_chemical_formula_sum            'C10 H12 N4 O3'
_chemical_formula_weight         236.24
_chemical_melting_point          427.15
_chemical_name_systematic
;
2-(2-deoxy-\b-D-erythro-furanosyl)-2H-pyrazolo[3,4-d]pyrimidine
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 102.772(9)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   4.9396(7)
_cell_length_b                   13.1528(14)
_cell_length_c                   8.1780(12)
_cell_measurement_reflns_used    47
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      16.09
_cell_measurement_theta_min      4.50
_cell_volume                     518.17(12)
_computing_cell_refinement       XSCANS
_computing_data_collection       'XSCANS (Siemens, 1996)'
_computing_data_reduction        'SHELXTL (Sheldrick, 1997)'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  SHELXTL
_computing_structure_solution    SHELXTL
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       2\q/\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  0.0208
_diffrn_reflns_av_sigmaI/netI    0.0242
_diffrn_reflns_limit_h_max       1
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            2202
_diffrn_reflns_theta_full        29.99
_diffrn_reflns_theta_max         29.99
_diffrn_reflns_theta_min         2.99
_diffrn_standards_decay_%        none
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.115
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.514
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'transparent block'
_exptl_crystal_F_000             248
_exptl_crystal_size_max          0.57
_exptl_crystal_size_mid          0.57
_exptl_crystal_size_min          0.48
_refine_diff_density_max         0.276
_refine_diff_density_min         -0.198
_refine_ls_extinction_coef       0.026(9)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXTL
_refine_ls_goodness_of_fit_ref   1.072
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     164
_refine_ls_number_reflns         1562
_refine_ls_number_restraints     51
_refine_ls_restrained_S_all      1.053
_refine_ls_R_factor_all          0.0332
_refine_ls_R_factor_gt           0.0328
_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^)+(0.0637P)^2^+0.0228P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0920
_refine_ls_wR_factor_ref         0.0924
_reflns_number_gt                1524
_reflns_number_total             1562
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ln1143.cif
_cod_data_source_block           III
_cod_depositor_comments
;
The following automatic conversions were performed:
'_geom_bond_publ_flag' value 'N' changed to 'n' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (30
times).

'_geom_bond_publ_flag' value 'Y' changed to 'y' 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 

The following automatic conversions were performed:

'_geom_bond_publ_flag' value 'N' changed to 'n' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (30
times).

'_geom_bond_publ_flag' value 'Y' changed to 'y' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from
2010-06-29.

'_geom_angle_publ_flag' value 'Y' changed to 'y'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29 (3
times).

'_geom_angle_publ_flag' value 'N' changed to 'n' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29 (51
time).

'_geom_torsion_publ_flag' value 'Y' changed to 'y' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29 (15
times).

'_geom_torsion_publ_flag' value 'N' changed to 'n' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29 (22 times).

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               2012995
_cod_database_fobs_code          2012995