Helical folding in heterogeneous foldamers without inter-residual backbone hydrogen-bonding
Gowri Priya; Amol Kotmale; Rupesh Gawade; Deepti Mishra; Sourav Pal; Vedavati Puranik; Pattuparambil Rajamohanan; Gangadhar J.Sanjayan; Chem.Commun. 48 (2012) 8922–; doi:10.1039/c2cc33235c

data_7108236
_publ_section_title
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 Helical folding in heterogeneous foldamers without inter-residual
 backbone hydrogen-bonding
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_journal_name_full               Chem.Commun.
_journal_page_first              8922
_journal_paper_doi               10.1039/c2cc33235c
_journal_volume                  48
_journal_year                    2012
_chemical_formula_moiety         'C26 H32 N4 O6 S2'
_chemical_formula_sum            'C26 H32 N4 O6 S2'
_chemical_formula_weight         560.68
_chemical_melting_point          414.6(15)
_chemical_name_common            foldamers
_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                 94.6130(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.3385(4)
_cell_length_b                   38.880(2)
_cell_length_c                   9.7776(6)
_cell_measurement_reflns_used    4268
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      23.679
_cell_measurement_theta_min      2.336
_cell_volume                     2780.7(3)
_computing_cell_refinement       'BRUKER SAINT'
_computing_data_collection       'BRUKER SMART'
_computing_data_reduction        'BRUKER SAINT'
_computing_molecular_graphics    'SHELXTL, PyMOL and PLATON'
_computing_publication_material  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 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device       'Bruker Smart APEX'
_diffrn_measurement_device_type  'CCD Area Detector'
_diffrn_measurement_method       'Omega Scan'
_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  0.0156
_diffrn_reflns_av_sigmaI/netI    0.0361
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       46
_diffrn_reflns_limit_k_min       -46
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            14101
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.09
_exptl_absorpt_coefficient_mu    0.238
_exptl_absorpt_correction_T_max  0.9688
_exptl_absorpt_correction_T_min  0.8999
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.339
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1184
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.216
_refine_diff_density_min         -0.161
_refine_diff_density_rms         0.038
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.04(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     710
_refine_ls_number_reflns         9614
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.0541
_refine_ls_R_factor_gt           0.0424
_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^)+(0.0545P)^2^+0.1787P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0961
_refine_ls_wR_factor_ref         0.1021
_reflns_number_gt                7980
_reflns_number_total             9614
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2cc33235c.txt
_cod_data_source_block           C26H32N4O6S2Compound4d
_cod_depositor_comments
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The following automatic conversions were performed:

'_chemical_melting_point' value '140-143 degree centigrade' was
changed to '414.6(15)' - it was converted from degrees Celsius(C) to
Kelvins(K), the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P21
_cod_database_code               7108236