Anti-parallel sheet structures of side-chain-free γ-, δ-, and ε-dipeptides stabilized by benzene–pentafluorobenzene stacking
Wang, Ji-Liang; Xu, Jia-Su; Wang, Dong-Yun; Wang, Hui; Li, Zhan-Ting; Zhang, Dan-Wei; CrystEngComm 16 (2014) 2078–; doi:10.1039/c3ce42060d

data_7213700
_publ_section_title
;
 Anti-parallel sheet structures of side-chain-free \g-, \d-, and
 \e-dipeptides stabilized by benzene--pentafluorobenzene stacking
;
_journal_issue                   10
_journal_name_full               CrystEngComm
_journal_page_first              2078
_journal_paper_doi               10.1039/c3ce42060d
_journal_volume                  16
_journal_year                    2014
_chemical_formula_sum            'C25 H28 F5 N3 O3'
_chemical_formula_weight         513.50
_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                 100.231(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.850(3)
_cell_length_b                   9.5190(13)
_cell_length_c                   13.5917(19)
_cell_measurement_reflns_used    8125
_cell_measurement_temperature    140(2)
_cell_measurement_theta_max      30.52
_cell_measurement_theta_min      2.40
_cell_volume                     2400.0(6)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      140(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_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  0.0516
_diffrn_reflns_av_sigmaI/netI    0.0426
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            16414
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.40
_exptl_absorpt_coefficient_mu    0.120
_exptl_absorpt_correction_T_max  0.9964
_exptl_absorpt_correction_T_min  0.9649
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.421
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1072
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.471
_refine_diff_density_min         -0.410
_refine_diff_density_rms         0.110
_refine_ls_extinction_coef       0.0053(16)
_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   1.233
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     326
_refine_ls_number_reflns         4702
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.233
_refine_ls_R_factor_all          0.0922
_refine_ls_R_factor_gt           0.0811
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1163P)^2^+10.8368P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.3056
_refine_ls_wR_factor_ref         0.3173
_reflns_number_gt                3951
_reflns_number_total             4702
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3ce42060d.txt
_cod_data_source_block           dm13126
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/automatic-downloads/current/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_cell_volume        2400.1(6)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7213700