Metal-promoted synthesis of amidines containing the model nucleobases 1-methylcytosine and 9-methyladenine.
Montagner, Diego; Zangrando, Ennio; Borsato, Giuseppe; Lucchini, Vittorio; Longato, Bruno; Dalton transactions (Cambridge, England : 2003) 40 (2011) 8664–8674; doi:10.1039/c1dt10638d

data_7016482
_publ_section_title
;
 Metal-promoted synthesis of amidines containing the model nucleobases
 1-methylcytosine and 9-methyladenine.
;
_journal_issue                   34
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              8664
_journal_page_last               8674
_journal_paper_doi               10.1039/c1dt10638d
_journal_volume                  40
_journal_year                    2011
_chemical_formula_moiety         'C12 H13 N4 O 1+, N O3 1-'
_chemical_formula_sum            'C12 H13 N5 O4'
_chemical_formula_weight         291.27
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 94.01(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.426(2)
_cell_length_b                   9.226(2)
_cell_length_c                   14.336(3)
_cell_measurement_temperature    293(2)
_cell_volume                     1375.6(5)
_computing_cell_refinement       'Denzo (Otwinowski & Minor 1997)'
_computing_data_collection       'Nonius Xpress'
_computing_data_reduction        'Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_molecular_graphics    'Ortep3/windows (Farrugia,1997)'
_computing_publication_material  'Wingx 1.70.00 (Farrugia, 1999)'
_computing_structure_refinement  'SHELX97 (Sheldrick, 1998)'
_computing_structure_solution    'SHELX97 (Sheldrick, 1998)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'image plate dip1030'
_diffrn_measurement_method       'laser scanner'
_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  0.0391
_diffrn_reflns_av_sigmaI/netI    0.0305
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            16205
_diffrn_reflns_theta_full        26.73
_diffrn_reflns_theta_max         26.73
_diffrn_reflns_theta_min         2.63
_exptl_absorpt_coefficient_mu    0.109
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    1.406
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             608
_refine_diff_density_max         0.412
_refine_diff_density_min         -0.261
_refine_diff_density_rms         0.046
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.085
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     200
_refine_ls_number_reflns         2901
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.085
_refine_ls_R_factor_all          0.0764
_refine_ls_R_factor_gt           0.0621
_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^)+(0.1231P)^2^+0.1439P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1920
_refine_ls_wR_factor_ref         0.2058
_reflns_number_gt                2134
_reflns_number_total             2901
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c1dt10638d.txt
_cod_data_source_block           3b
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7016482