A supramolecular double-helix based on complementary phosphate-guanidinium pairing.
Thiele, Maike; Octa-Smolin, Frescilia; Thölke, Simon; Wölper, Christoph; Linders, Jürgen; Mayer, Christian; Haberhauer, Gebhard; Niemeyer, Jochen; Chemical communications (Cambridge, England) 57 (2021) 9842–9845; doi:10.1039/d1cc04644f

data_7128909
_publ_section_title
;
 A supramolecular double-helix based on complementary
 phosphate-guanidinium pairing.
;
_journal_issue                   77
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              9842
_journal_page_last               9845
_journal_paper_doi               10.1039/d1cc04644f
_journal_volume                  57
_journal_year                    2021
_chemical_formula_sum            'C28 H27 I2 N O3'
_chemical_formula_weight         679.30
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2017/1
_audit_update_record
;
2021-04-16 deposited with the CCDC.	2021-08-27 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 115.219(6)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   11.8508(16)
_cell_length_b                   9.1039(12)
_cell_length_c                   13.2298(17)
_cell_measurement_reflns_used    9394
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      80.12
_cell_measurement_theta_min      3.69
_cell_volume                     1291.3(3)
_computing_cell_refinement       'Bruker APEX3(v2017.3-0)'
_computing_data_collection       'Bruker APEX3(v2017.3-0)'
_computing_data_reduction        'Bruker APEX3(v2017.3-0)'
_computing_molecular_graphics    'ORTEP/PLATON (Spek)'
_computing_publication_material  'BRUKER AXS SHELXTL (c) 2008 / Vers. 2008/4'
_computing_structure_refinement  'SHELXL-2017/1 (Sheldrick, 2017)'
_computing_structure_solution    'Bruker APEX3(v2017.3-0)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 7.3910
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Bruker D8 Venture (Photon II detector)'
_diffrn_measurement_method       'Data collection strategy APEX 3/Queen'
_diffrn_radiation_monochromator  'multilayer mirror'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0778
_diffrn_reflns_av_unetI/netI     0.0405
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.989
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            49382
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.989
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         81.331
_diffrn_reflns_theta_min         3.693
_diffrn_source                   'micro-focus sealed tube'
_diffrn_source_type              'INCOATEC I\mS 3.0'
_exptl_absorpt_coefficient_mu    19.363
_exptl_absorpt_correction_T_max  0.75
_exptl_absorpt_correction_T_min  0.44
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
 SADABS
 R.H. Blessing, Acta Cryst. (1995) A51 33-38 
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.747
_exptl_crystal_description       plate
_exptl_crystal_F_000             664
_exptl_crystal_size_max          0.261
_exptl_crystal_size_mid          0.173
_exptl_crystal_size_min          0.011
_refine_diff_density_max         2.152
_refine_diff_density_min         -0.577
_refine_diff_density_rms         0.144
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.163(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.064
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     316
_refine_ls_number_reflns         5431
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.063
_refine_ls_R_factor_all          0.0468
_refine_ls_R_factor_gt           0.0427
_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^)+(0.0522P)^2^+4.0856P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1045
_refine_ls_wR_factor_ref         0.1088
_reflns_Friedel_coverage         0.881
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.990
_reflns_number_gt                5111
_reflns_number_total             5431
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1cc04644f2.cif
_cod_data_source_block           mt_317_2m
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_atom_sites_solution_secondary' value 'diffmap' was
changed to 'difmap'.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 

 Adding full bibliography for 7128905--7128910.cif.
;
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7128909
_shelx_shelxl_version_number     2017/1
_shelx_estimated_absorpt_t_min   0.081
_shelx_estimated_absorpt_t_max   0.815
_shelx_res_checksum              53423
_shelx_hkl_checksum              30339