Water mediated tube in tetrapeptide cyclo(Phe-Pro-Leu-Aha) trihydrate and crystal structure of cyclo(d-Phe-Pro-Leu-Aha) anhydrate
Rajesh, B. M.; Iqbal, Javed; Babu, N. Jagadeesh; Nangia, Ashwini; CrystEngComm 9 (2007) 860–; doi:10.1039/b709700j

data_7203079
_publ_section_title
;
 Water mediated tube in tetrapeptide cyclo(Phe-Pro-Leu-Aha) trihydrate
 and crystal structure of cyclo(d-Phe-Pro-Leu-Aha) anhydrate
;
_journal_issue                   10
_journal_name_full               CrystEngComm
_journal_page_first              860
_journal_paper_doi               10.1039/b709700j
_journal_volume                  9
_journal_year                    2007
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C26 H38 N4 O4, 3(H2 O)'
_chemical_formula_sum            'C26 H44 N4 O7'
_chemical_formula_weight         524.65
_chemical_name_common            cyclo(Phe-Pro-Leu-Aha)
_chemical_name_systematic
;
?
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.4493(16)
_cell_length_b                   14.125(2)
_cell_length_c                   21.736(4)
_cell_measurement_reflns_used    7206
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      23.06
_cell_measurement_theta_min      2.35
_cell_volume                     2901.1(8)
_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      298(2)
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_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  0.0384
_diffrn_reflns_av_sigmaI/netI    0.0245
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            21171
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.72
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  0.9828
_exptl_absorpt_correction_T_min  0.9552
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker AXS SADABS program'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.201
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1136
_exptl_crystal_size_max          0.53
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.417
_refine_diff_density_min         -0.237
_refine_diff_density_rms         0.041
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.149
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     376
_refine_ls_number_reflns         3176
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.149
_refine_ls_R_factor_all          0.0768
_refine_ls_R_factor_gt           0.0665
_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^)+(0.0708P)^2^+1.0583P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1537
_refine_ls_wR_factor_ref         0.1596
_reflns_number_gt                2742
_reflns_number_total             3176
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b709700j.txt
_cod_data_source_block           an630_m
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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        2901.3(8)
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7203079