G-quartet formation from an N2-modified guanosine derivative
Liu, Xiangyang; Kwan, Irene C. M.; Wang, Suning; Wu, Gang; Organic Letters 8 (2006) 3685–3688; doi:10.1021/ol061236w

data_1513312
_publ_section_title
;
 G-quartet formation from an N2-modified guanosine derivative
;
_journal_coden_ASTM              ORLEF7
_journal_issue                   17
_journal_name_full               'Organic Letters'
_journal_page_first              3685
_journal_page_last               3688
_journal_paper_doi               10.1021/ol061236w
_journal_volume                  8
_journal_year                    2006
_chemical_formula_sum            'C26 H30 N5 O8'
_chemical_formula_weight         540.54
_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                 105.111(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.019(2)
_cell_length_b                   10.726(3)
_cell_length_c                   14.449(4)
_cell_measurement_temperature    296(2)
_cell_volume                     1349.4(6)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.938
_diffrn_measured_fraction_theta_max 0.938
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0550
_diffrn_reflns_av_sigmaI/netI    0.0776
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            9680
_diffrn_reflns_theta_full        28.42
_diffrn_reflns_theta_max         28.42
_diffrn_reflns_theta_min         1.46
_exptl_absorpt_coefficient_mu    0.100
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.414
_exptl_absorpt_correction_type   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.330
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rectangle
_exptl_crystal_F_000             570
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.6
_refine_diff_density_max         0.375
_refine_diff_density_min         -0.241
_refine_diff_density_rms         0.050
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.0(15)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.942
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     353
_refine_ls_number_reflns         4735
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.942
_refine_ls_R_factor_all          0.0919
_refine_ls_R_factor_gt           0.0551
_refine_ls_shift/su_max          0.076
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0770P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1266
_refine_ls_wR_factor_ref         0.1405
_reflns_number_gt                3023
_reflns_number_total             4735
_reflns_threshold_expression     >2sigma(I)
_cod_duplicate_entry             1506110
_cod_data_source_file            ol061236wsup1.cif
_cod_data_source_block           xliu9
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 

 Updated bibliographic information.

 Antanas Vaitkus,
 2019-09-20

 Marked entry as a duplicate of entry 1506110.

 Antanas Vaitkus,
 2019-09-20
;
_cod_original_cell_volume        1349.5(6)
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               1513312