From helical supramolecular arrays to gel-forming networks: lattice restructuring and aggregation control in peptide-based sulfamides to integrate new functional attributes.
Raghava, Saripalli V.; Srivastava, Bhartendu K.; Ramshad, Kalluruttimmal; Antharjanam, Sudhadevi; Varghese, Babu; Muraleedharan, Kannoth M.; Soft matter 14 (2018) 2357–2364; doi:10.1039/c7sm02495a

data_1548894
_publ_section_title
;
 From helical supramolecular arrays to gel-forming networks: lattice
 restructuring and aggregation control in peptide-based sulfamides to
 integrate new functional attributes.
;
_journal_issue                   12
_journal_name_full               'Soft matter'
_journal_page_first              2357
_journal_page_last               2364
_journal_paper_doi               10.1039/c7sm02495a
_journal_volume                  14
_journal_year                    2018
_chemical_absolute_configuration ad
_chemical_formula_sum            'C26 H50 N4 O8 S'
_chemical_formula_weight         578.76
_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'
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2017-11-01 deposited with the CCDC.
2018-02-08 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90.105(3)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   10.0952(13)
_cell_length_b                   16.406(2)
_cell_length_c                   10.2489(14)
_cell_measurement_reflns_used    4544
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      22.1
_cell_measurement_theta_min      2.3
_cell_volume                     1697.4(4)
_computing_cell_refinement       'APEX2/SAINT (Bruker, 2004)'
_computing_data_collection       'APEX2 (Bruker, 2004)'
_computing_data_reduction        'SAINT/XPREP (Bruker, 2004)'
_computing_molecular_graphics
'ORTEP3 (Farrugia, 1997) and Mercury (Bruno et al., 2002)'
_computing_publication_material  'SHELXL-2014 (Sheldrick, 2014)'
_computing_structure_refinement  'SHELXL-2014 (Sheldrick, 2014)'
_computing_structure_solution    'SIR92 (Altornare et al., 1993)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker axs kappa apex2 CCD Diffractometer'
_diffrn_measurement_method       '\w and \f scan'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0365
_diffrn_reflns_av_unetI/netI     0.0567
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            17341
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        24.482
_diffrn_reflns_theta_max         24.482
_diffrn_reflns_theta_min         1.987
_diffrn_source                   'Sealed tube'
_exptl_absorpt_coefficient_mu    0.141
_exptl_absorpt_correction_T_max  0.93
_exptl_absorpt_correction_T_min  0.91
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 1999)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.132
_exptl_crystal_description       block
_exptl_crystal_F_000             628
_exptl_crystal_size_max          0.400
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.200
_refine_diff_density_max         0.342
_refine_diff_density_min         -0.247
_refine_diff_density_rms         0.039
_refine_ls_abs_structure_details
;
 Flack x determined using 1132 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.02(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.024
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     415
_refine_ls_number_reflns         5633
_refine_ls_number_restraints     157
_refine_ls_restrained_S_all      1.017
_refine_ls_R_factor_all          0.1287
_refine_ls_R_factor_gt           0.0700
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0583P)^2^+1.0115P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1457
_refine_ls_wR_factor_ref         0.1725
_reflns_Friedel_coverage         0.923
_reflns_Friedel_fraction_full    0.997
_reflns_Friedel_fraction_max     0.997
_reflns_number_gt                3340
_reflns_number_total             5633
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7sm02495a2.cif
_cod_data_source_block           leunew
_cod_depositor_comments
'Adding full bibliography for 1548893--1548896.cif.'
_cod_database_code               1548894
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.946
_shelx_estimated_absorpt_t_max   0.972
_shelx_res_checksum              88292