Aggregation modes in sheets formed by protected beta-amino acids and beta-peptides.
Sengupta, Anindita; Roy, Rituparna S.; Sabareesh, Varatharajan; Shamala, Narayanaswamy; Balaram, Padmanabhan; Organic & biomolecular chemistry 4 (2006) 1166–1173; doi:10.1039/b516088j

data_7150420
_publ_section_title
;
 Aggregation modes in sheets formed by protected beta-amino acids and
 beta-peptides.
;
_journal_issue                   6
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              1166
_journal_page_last               1173
_journal_paper_doi               10.1039/b516088j
_journal_volume                  4
_journal_year                    2006
_chemical_formula_sum            'C11 H19 N O4'
_chemical_formula_weight         229.27
_chemical_name_common            Boc-betaPro-OH
_space_group_IT_number           1
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  'P 1'
_symmetry_space_group_name_H-M   'P 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                70.749(5)
_cell_angle_beta                 77.415(5)
_cell_angle_gamma                86.976(5)
_cell_formula_units_Z            1
_cell_length_a                   5.989(2)
_cell_length_b                   6.651(2)
_cell_length_c                   8.661(3)
_cell_measurement_temperature    293(2)
_cell_volume                     317.81(18)
_computing_data_collection       SMART
_computing_data_reduction        SAINT
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.926
_diffrn_measured_fraction_theta_max 0.926
_diffrn_measurement_device_type  'BRUKER AXS SMART APEX CCD with Mo source'
_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  0.0629
_diffrn_reflns_av_sigmaI/netI    0.0471
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            3471
_diffrn_reflns_theta_full        27.23
_diffrn_reflns_theta_max         27.23
_diffrn_reflns_theta_min         2.55
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.198
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             124
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.369
_refine_diff_density_min         -0.309
_refine_diff_density_rms         0.057
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -10(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.122
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     146
_refine_ls_number_reflns         1312
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.121
_refine_ls_R_factor_all          0.0589
_refine_ls_R_factor_gt           0.0566
_refine_ls_shift/su_max          0.038
_refine_ls_shift/su_mean         0.009
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1120P)^2^+0.0211P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1641
_refine_ls_wR_factor_ref         0.1666
_reflns_number_gt                1221
_reflns_number_total             1312
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b516088j.txt
_cod_data_source_block           bpro
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'None' changed to
'none' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_cell_volume        317.78(19)
_cod_original_sg_symbol_H-M      P1
_cod_database_code               7150420