6-Substituted purines containing thienyl or furyl substituents as artificial nucleobases for metal-mediated base pairing.
Sinha, Indranil; Kösters, Jutta; Hepp, Alexander; Müller, Jens; Dalton transactions (Cambridge, England : 2003) 42 (2013) 16080–16089; doi:10.1039/c3dt51691a

data_7023644
_publ_section_title
;
 6-Substituted purines containing thienyl or furyl substituents as
 artificial nucleobases for metal-mediated base pairing.
;
_journal_issue                   45
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              16080
_journal_page_last               16089
_journal_paper_doi               10.1039/c3dt51691a
_journal_volume                  42
_journal_year                    2013
_chemical_formula_sum            'C10 H8 N4 O'
_chemical_formula_weight         200.20
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 98.245(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.4259(2)
_cell_length_b                   17.6396(5)
_cell_length_c                   6.8688(2)
_cell_measurement_reflns_used    5173
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      30.0314
_cell_measurement_theta_min      2.3092
_cell_volume                     890.44(4)
_computing_cell_refinement       'SAINT V8.18C (Bruker AXS Inc.)'
_computing_data_collection       'APEX2 v2012.2-0'
_computing_data_reduction        'SAINT V8.18C (Bruker AXS Inc.)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      153(2)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'APEX-II CCD-detector'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  'Quazar Mo multilayer optic'
_diffrn_radiation_source         Microfocus
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0296
_diffrn_reflns_av_sigmaI/netI    0.0198
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            15422
_diffrn_reflns_theta_full        30.08
_diffrn_reflns_theta_max         30.08
_diffrn_reflns_theta_min         2.77
_exptl_absorpt_coefficient_mu    0.104
_exptl_absorpt_correction_T_max  0.9959
_exptl_absorpt_correction_T_min  0.9597
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2008/1 (Bruker AXS)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.493
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             416
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.398
_refine_diff_density_min         -0.268
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.066
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     137
_refine_ls_number_reflns         2620
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.066
_refine_ls_R_factor_all          0.0497
_refine_ls_R_factor_gt           0.0422
_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^)+(0.0623P)^2^+0.3594P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1181
_refine_ls_wR_factor_ref         0.1239
_reflns_number_gt                2226
_reflns_number_total             2620
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3dt51691a.txt
_cod_data_source_block           sad
_cod_database_code               7023644