Supramolecular structures of <i>N</i>^4^-substituted 2,4-diamino-6-benzyloxy-5-nitrosopyrimidines
Melguizo, Manuel; Quesada, Antonio; Low, John N.; Glidewell, Christopher; Acta Crystallographica Section B 59 (2003) 263–276; doi:10.1107/S0108768103002477

data_2103875
_publ_section_title
;
 Supramolecular structures of <i>N</i>^4^-substituted
 2,4-diamino-6-benzyloxy-5-nitrosopyrimidines
;
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              263
_journal_page_last               276
_journal_paper_doi               10.1107/S0108768103002477
_journal_volume                  59
_journal_year                    2003
_chemical_formula_moiety         'C16 H20 N4 O'
_chemical_formula_sum            'C16 H20 N4 O'
_chemical_formula_weight         284.36
_chemical_name_systematic
;
2-Amino-6-benzyloxy-4-piperidino-pyrimidine
;
_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
_cell_angle_alpha                76.1950(14)
_cell_angle_beta                 82.3623(14)
_cell_angle_gamma                77.330(4)
_cell_formula_units_Z            4
_cell_length_a                   6.5025(2)
_cell_length_b                   11.8006(4)
_cell_length_c                   20.7673(10)
_cell_measurement_reflns_used    6307
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.44
_cell_measurement_theta_min      3.19
_cell_volume                     1504.36(10)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'Kappa-CCD server software (Nonius, 1997)'
_computing_data_reduction        'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'PLATON (Spek, 2002)'
_computing_publication_material
'SHELXL-97 (Sheldrick, 1997a) and PRPKAPPA (Ferguson, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997a)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997b)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.955
_diffrn_measured_fraction_theta_max 0.916
_diffrn_measurement_device_type  Kappa-CCD
_diffrn_measurement_method       '\f scans, and \w scans with \k offsets'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed X-ray tube'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.054
_diffrn_reflns_av_sigmaI/netI    0.0686
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            17141
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         27.44
_diffrn_reflns_theta_min         3.19
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.994
_exptl_absorpt_correction_T_min  0.965
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO-SMN (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.255
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             608
_exptl_crystal_size_max          0.70
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.331
_refine_diff_density_min         -0.369
_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     379
_refine_ls_number_reflns         6307
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0969
_refine_ls_R_factor_gt           0.0557
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0891P)^2^+0.0112P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1355
_refine_ls_wR_factor_ref         0.1611
_reflns_number_gt                4163
_reflns_number_total             6307
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            na0145.cif
_cod_data_source_block           9
_cod_depositor_comments
;
The following automatic conversions were performed:
'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' 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:

'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' 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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_database_code               2103875
_cod_database_fobs_code          2103875