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_7108571
_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_formula_moiety         'C20 H21 N3 O3'
_chemical_formula_sum            'C20 H21 N3 O3'
_chemical_formula_weight         351.40
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 118.719(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   21.610(3)
_cell_length_b                   8.6706(12)
_cell_length_c                   21.210(3)
_cell_measurement_reflns_used    6611
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.99
_cell_measurement_theta_min      2.19
_cell_volume                     3485.3(8)
_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 0.997
_diffrn_measured_fraction_theta_max 0.997
_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  0.0619
_diffrn_reflns_av_sigmaI/netI    0.0505
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            17077
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.07
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_T_max  0.9922
_exptl_absorpt_correction_T_min  0.9466
_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             1488
_exptl_crystal_size_max          0.61
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.343
_refine_diff_density_min         -0.335
_refine_diff_density_rms         0.066
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.085
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     480
_refine_ls_number_reflns         6121
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.085
_refine_ls_R_factor_all          0.0561
_refine_ls_R_factor_gt           0.0511
_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^)+(0.0459P)^2^+2.2021P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1208
_refine_ls_wR_factor_ref         0.1240
_reflns_number_gt                5518
_reflns_number_total             6121
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2cc35649j.txt
_cod_data_source_block           7
_cod_original_cell_volume        3485.2(8)
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7108571