The ability of lower peptides to form co-crystals: inclusion compounds of Leu-Leu-Leu tripeptide with pyridine and picolines
Burchell, Tara J.; Soldatov, Dmitriy V.; Enright, Gary D.; Ripmeester, John A.; CrystEngComm 9 (2007) 922–; doi:10.1039/b708695d

data_7203044
_publ_section_title
;
 The ability of lower peptides to form co-crystals: inclusion compounds
 of Leu-Leu-Leu tripeptide with pyridine and picolines
;
_journal_issue                   10
_journal_name_full               CrystEngComm
_journal_page_first              922
_journal_paper_doi               10.1039/b708695d
_journal_volume                  9
_journal_year                    2007
_chemical_absolute_configuration rm
_chemical_formula_sum            'C24 H42.28 N4 O4.14'
_chemical_formula_weight         453.22
_chemical_name_common
;L-leucyl-L-leucyl-L-leucine - 4-methylpyridine clathrate
(1:1:0.14)
;
_chemical_name_systematic
;
?
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 98.904(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.5358(6)
_cell_length_b                   23.6420(17)
_cell_length_c                   12.0899(8)
_cell_measurement_reflns_used    9888
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.74
_cell_measurement_theta_min      2.42
_cell_volume                     2692.8(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker 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 0.871
_diffrn_measured_fraction_theta_max 0.871
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0338
_diffrn_reflns_av_sigmaI/netI    0.0366
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       27
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            62643
_diffrn_reflns_theta_full        28.30
_diffrn_reflns_theta_max         28.30
_diffrn_reflns_theta_min         2.68
_exptl_absorpt_coefficient_mu    0.077
_exptl_absorpt_correction_T_max  0.9886
_exptl_absorpt_correction_T_min  0.9627
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.118
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    .
_exptl_crystal_description       plate
_exptl_crystal_F_000             990
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.252
_refine_diff_density_min         -0.291
_refine_diff_density_rms         0.039
_refine_ls_abs_structure_details rm
_refine_ls_extinction_coef       0.0055(8)
_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   1.032
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     982
_refine_ls_number_reflns         11005
_refine_ls_number_restraints     1031
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0691
_refine_ls_R_factor_gt           0.0436
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0555P)^2^+0.5986P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0985
_refine_ls_wR_factor_ref         0.1129
_reflns_number_gt                8581
_reflns_number_total             11005
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b708695d.txt
_cod_data_source_block           compound_4
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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_sg_symbol_H-M      P2(1)
_cod_database_code               7203044