Diacid Linkers That Promote Parallel β-Sheet Secondary Structure in Water
Felix Freire; John D. Fisk; Aaron J. Peoples; Monika Ivancic; Ilia A. Guzei; Samuel H. Gellman; Journal of the American Chemical Society 130 (2008) 7839–7841; doi:10.1021/ja802042c

data_4107928
_publ_contact_author_address
;
Department of Chemistry
University of Wisconsin-Madison
1101 University Ave
Madison, WI  53706
USA
;
_publ_contact_author_email       iguzei@chem.wisc.edu
_publ_contact_author_fax         608-262-0381
_publ_contact_author_name
;
Guzei, Ilia A. 
;
_publ_contact_author_phone       608-263-4694
_publ_section_title
;
 Diacid Linkers That Promote Parallel \b-Sheet Secondary Structure in
 Water
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              7839
_journal_page_last               7841
_journal_paper_doi               10.1021/ja802042c
_journal_volume                  130
_journal_year                    2008
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C25 H45 N5 O5'
_chemical_formula_sum            'C25 H45 N5 O5'
_chemical_formula_weight         495.66
_space_group_IT_number           173
_symmetry_cell_setting           hexagonal
_symmetry_Int_Tables_number      173
_symmetry_space_group_name_Hall  'P 6c'
_symmetry_space_group_name_H-M   'P 63'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method
;
manual editing of the CIF file 
created by SHELXTL Ver. 6.10
and processed with modiCIfer-09152005. 
;
_audit_update_record
;
2007-12-04 # Formatted by publCIF
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            6
_cell_length_a                   21.498(3)
_cell_length_b                   21.498(3)
_cell_length_c                   10.836(3)
_cell_measurement_reflns_used    444
_cell_measurement_temperature    105(2)
_cell_measurement_theta_max      21.4808
_cell_measurement_theta_min      2.6726
_cell_volume                     4337.1(15)
_computing_cell_refinement       'SAINT Ver. 6.22  (Bruker-AXS, 2003)'
_computing_data_collection       'SMART Ver. 5.622 (Bruker-AXS, 2003)'
_computing_data_reduction        'SAINT Ver. 6.22'
_computing_molecular_graphics    'SHELXTL Ver. 6.10'
_computing_publication_material  'SHELXTL Ver. 6.10'
_computing_structure_refinement  'SHELXTL Ver. 6.10'
_computing_structure_solution    'SHELXTL Ver. 6.10 (Bruker-AXS, 2003)'
_diffrn_ambient_temperature      105(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker CCD-1000 area detector'
_diffrn_measurement_method       '0.30\% \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           Mo-K\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1354
_diffrn_reflns_av_sigmaI/netI    0.0474
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            31816
_diffrn_reflns_theta_full        20.83
_diffrn_reflns_theta_max         20.83
_diffrn_reflns_theta_min         1.89
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  0.9929
_exptl_absorpt_correction_T_min  0.9696
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS  (Bruker-AXS, 2003)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.139
_exptl_crystal_description       block
_exptl_crystal_F_000             1620
_exptl_crystal_size_max          0.39
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.589
_refine_diff_density_min         -0.609
_refine_diff_density_rms         0.094
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   1(6)
_refine_ls_extinction_coef       0.017(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     298
_refine_ls_number_reflns         1624
_refine_ls_number_restraints     455
_refine_ls_restrained_S_all      0.928
_refine_ls_R_factor_all          0.1299
_refine_ls_R_factor_gt           0.1025
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1851P)^2^+13.8893P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2581
_refine_ls_wR_factor_ref         0.2898
_reflns_number_gt                1279
_reflns_number_total             1624
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ja802042c-file005.cif
_cod_data_source_block           gellman76
_cod_original_cell_volume        4337.2(12)
_cod_original_sg_symbol_Hall     'P 6c        '
_cod_original_sg_symbol_H-M      'P 63 '
_cod_database_code               4107928