Glycine homopeptides: the effect of the chain length on the crystal structure and solid state reactivity
Smith, Aaron J.; Ali, Farukh I.; Soldatov, Dmitriy V.; CrystEngComm 16 (2014) 7196–; doi:10.1039/C4CE00630E

data_7215768
_publ_section_title
;
 Glycine homopeptides: the effect of the chain length on the crystal
 structure and solid state reactivity
;
_journal_issue                   31
_journal_name_full               CrystEngComm
_journal_page_first              7196
_journal_paper_doi               10.1039/C4CE00630E
_journal_volume                  16
_journal_year                    2014
_chemical_formula_moiety         'C8 H14 N4 O5'
_chemical_formula_sum            'C8 H14 N4 O5'
_chemical_formula_weight         246.23
_chemical_name_common            Tetraglycine
_chemical_name_systematic
;
  Glycyl-glycyl-glycyl-glycine
;
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                67.284(3)
_cell_angle_beta                 85.298(3)
_cell_angle_gamma                88.190(3)
_cell_formula_units_Z            4
_cell_length_a                   4.8042(2)
_cell_length_b                   14.8701(5)
_cell_length_c                   15.6243(5)
_cell_measurement_reflns_used    11175
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      75.1159
_cell_measurement_theta_min      3.0725
_cell_volume                     1026.14(7)
_computing_cell_refinement
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CrysAlisPro, Agilent Technologies,
Version 1.171.35.8 (release 07-03-2011 CrysAlis171 .NET)
(compiled Mar  7 2011,18:06:32)
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_computing_data_collection
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CrysAlisPro, Agilent Technologies,
Version 1.171.35.8 (release 07-03-2011 CrysAlis171 .NET)
(compiled Mar  7 2011,18:06:32)
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_computing_data_reduction
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CrysAlisPro, Agilent Technologies,
Version 1.171.35.8 (release 07-03-2011 CrysAlis171 .NET)
(compiled Mar  7 2011,18:06:32)
;
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    SIR-92
_diffrn_ambient_temperature      295(2)
_diffrn_detector_area_resol_mean 10.3693
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, Atlas'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_source         'SuperNova (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0303
_diffrn_reflns_av_unetI/netI     0.0193
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            19837
_diffrn_reflns_point_group_measured_fraction_full 0.993
_diffrn_reflns_point_group_measured_fraction_max 0.992
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         75.296
_diffrn_reflns_theta_min         3.075
_exptl_absorpt_coefficient_mu    1.146
_exptl_absorpt_correction_T_max  0.9664
_exptl_absorpt_correction_T_min  0.6571
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.8 (release 07-03-2011 CrysAlis171 .NET)
(compiled Mar  7 2011,18:06:32)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.594
_exptl_crystal_description       plate
_exptl_crystal_F_000             520
_exptl_crystal_size_max          0.400
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.030
_refine_diff_density_max         0.260
_refine_diff_density_min         -0.228
_refine_diff_density_rms         0.048
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.018
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     309
_refine_ls_number_reflns         4181
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.018
_refine_ls_R_factor_all          0.0404
_refine_ls_R_factor_gt           0.0391
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0719P)^2^+0.2181P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1101
_refine_ls_wR_factor_ref         0.1116
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3963
_reflns_number_total             4181
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c4ce00630e2.cif
_cod_data_source_block           shelx
_cod_depositor_comments
'Adding full bibliography for 7215768--7215769.cif.'
_cod_database_code               7215768
_shelx_estimated_absorpt_t_min   0.657
_shelx_estimated_absorpt_t_max   0.966
_shelxl_version_number           2013-4
_shelx_res_checksum              83098