Amino-substituted O^6^-benzyl-5-nitrosopyrimidines: interplay of molecular, molecular-electronic and supramolecular structures
Quesada, Antonio; Marchal, Antonio; Melguizo, Manuel; Nogueras, Manuel; Sánchez, Adolfo; Low, John N.; Cannon, Debbie; Farrell, Dorcas M. M.; Glidewell, Christopher; Acta Crystallographica Section B 58 (2002) 300–315; doi:10.1107/S0108768101021607

data_2103283
_publ_section_title
;
 Amino-substituted O^6^-benzyl-5-nitrosopyrimidines: interplay of
 molecular, molecular-electronic and supramolecular structures
;
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              300
_journal_page_last               315
_journal_paper_doi               10.1107/S0108768101021607
_journal_volume                  58
_journal_year                    2002
_chemical_formula_moiety         'C16 H19 N5 O4'
_chemical_formula_sum            'C16 H19 N5 O4'
_chemical_formula_weight         345.36
_chemical_name_systematic
;
Ethyl N-(2-amino-6 benzyloxy-5-nitrosopyrimidin-4-yl)-\b-alaninate
;
_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                 100.200(12)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.2399(16)
_cell_length_b                   31.1630(14)
_cell_length_c                   9.792(4)
_cell_measurement_reflns_used    66201
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      1.02
_cell_volume                     1573.7(8)
_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, 2001)'
_computing_publication_material
'SHELXL-97 (Sheldrick, 1997b) and PRPKAPPA (Ferguson, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997b)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997a)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.910
_diffrn_measured_fraction_theta_max 0.910
_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  0.065
_diffrn_reflns_av_sigmaI/netI    0.2746
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       37
_diffrn_reflns_limit_k_min       -36
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            10470
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.48
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.108
_exptl_absorpt_correction_T_max  0.9978
_exptl_absorpt_correction_T_min  0.9788
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO-SMN (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.458
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             728
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.231
_refine_diff_density_min         -0.219
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.001
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     227
_refine_ls_number_reflns         2525
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.001
_refine_ls_R_factor_all          0.2999
_refine_ls_R_factor_gt           0.1059
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0757P)^2^+2.3684P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2087
_refine_ls_wR_factor_ref         0.2829
_reflns_number_gt                822
_reflns_number_total             2525
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            na0133.cif
_cod_data_source_block           5A
_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_original_sg_symbol_H-M      P21/c
_cod_database_code               2103283
_cod_database_fobs_code          2103283