Multifaceted folding in a foldamer featuring highly cooperative folds
Veera V. E. Ramesh; Gowri Priya; Amol S. Kotmale; Rajesh G. Gonnade; Pattuparambil R. Rajamohanan; Gangadhar J. Sanjayan; Chem.Commun. 48 (2012) 11205–; doi:10.1039/c2cc35649j

data_7108569
_publ_section_title
;
 Multifaceted folding in a foldamer featuring highly cooperative folds
;
_journal_name_full               Chem.Commun.
_journal_page_first              11205
_journal_paper_doi               10.1039/c2cc35649j
_journal_volume                  48
_journal_year                    2012
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C23 H26 N4 O5'
_chemical_formula_sum            'C23 H26 N4 O5'
_chemical_formula_weight         438.48
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.564(3)
_cell_length_b                   15.725(7)
_cell_length_c                   18.913(8)
_cell_measurement_reflns_used    5455
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.28
_cell_measurement_theta_min      2.16
_cell_volume                     2249.6(16)
_computing_cell_refinement       'BRUKER SAINT'
_computing_data_collection       'BRUKER SMART'
_computing_data_reduction        'BRUKER SAINT'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(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 and phi 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  0.0510
_diffrn_reflns_av_sigmaI/netI    0.0418
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            16193
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.68
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_T_max  0.9967
_exptl_absorpt_correction_T_min  0.9665
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'BRUKER SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.295
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             928
_exptl_crystal_size_max          0.37
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.197
_refine_diff_density_min         -0.162
_refine_diff_density_rms         0.040
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.2(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.190
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     365
_refine_ls_number_reflns         3957
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.190
_refine_ls_R_factor_all          0.0447
_refine_ls_R_factor_gt           0.0420
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0224P)^2^+0.7706P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0871
_refine_ls_wR_factor_ref         0.0882
_reflns_number_gt                3787
_reflns_number_total             3957
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2cc35649j.txt
_cod_data_source_block           5
_cod_original_cell_volume        2249.7(16)
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7108569