Spirocyclic systems derived from pyroglutamic acid.
Cowley, Andrew R.; Hill, Thomas J.; Kocis, Petr; Moloney, Mark G.; Stevenson, Robert D.; Thompson, Amber L.; Organic & biomolecular chemistry 9 (2011) 7042–7056; doi:10.1039/c1ob05708a

data_7151988
_publ_section_title
;
 Spirocyclic systems derived from pyroglutamic acid.
;
_journal_issue                   20
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              7042
_journal_page_last               7056
_journal_paper_doi               10.1039/c1ob05708a
_journal_volume                  9
_journal_year                    2011
_chemical_absolute_configuration syn
_chemical_compound_source
;
synthesis as described
;
_chemical_formula_moiety         ' C23 H22 N2 O4 '
_chemical_formula_sum            'C23 H22 N2 O4'
_chemical_formula_weight         390.44
_chemical_melting_point          ?
_space_group_IT_number           170
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  'P 65'
_symmetry_space_group_name_H-M   'P 65'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_formula_units_Z            6
_cell_length_a                   9.7445(2)
_cell_length_b                   9.7445(2)
_cell_length_c                   37.3937(5)
_cell_measurement_reflns_used    20963
_cell_measurement_temperature    150
_cell_measurement_theta_max      28
_cell_measurement_theta_min      5
_cell_volume                     3075.02(10)
_computing_cell_refinement
;
KappaCCD software 'DENZO' (Otwinowski & Minor, 1996)
;
_computing_data_collection
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KappaCCD software 'Collect' (Nonius, 2000)
;
_computing_data_reduction
;
KappaCCD software 'DENZO' (Otwinowski & Minor, 1996)
;
_computing_publication_material
;
CRYSTALS (Watkin et al, 2001)
;
_computing_structure_refinement
;
CRYSTALS (Watkin et al, 2001)
;
_computing_structure_solution    'SIR92 (Giacovazzo et al, 1992)'
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type
;
Nonius KappaCCD
;
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.055
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       48
_diffrn_reflns_limit_l_min       -48
_diffrn_reflns_number            20963
_diffrn_reflns_theta_full        27.46
_diffrn_reflns_theta_max         27.46
_diffrn_reflns_theta_min         5.30
_diffrn_standards_decay_%        0.00
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  0.97
_exptl_absorpt_correction_T_min  0.97
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
Denzo/Scalepack (Otwinowski & Minor, 1996)
;
_exptl_crystal_colour            ' colourless '
_exptl_crystal_density_diffrn    1.265
_exptl_crystal_density_meas      ?
_exptl_crystal_description       ' fragment '
_exptl_crystal_F_000             1236.
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.28
_refine_diff_density_min         -0.20
_refine_ls_extinction_method     None
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_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     262
_refine_ls_number_reflns         1557
_refine_ls_R_factor_gt           0.0474
_refine_ls_shift/su_max          0.006524
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
Chebychev polynomial with 3 parameters (Carruthers & Watkin , 1979)
0.600 0.279 0.329
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.0555
_reflns_limit_h_max              0
_reflns_limit_h_min              -10
_reflns_limit_k_max              12
_reflns_limit_k_min              0
_reflns_limit_l_max              48
_reflns_limit_l_min              0
_reflns_number_gt                1557
_reflns_number_total             2399
_reflns_threshold_expression     >2.00\s(I)
_cod_data_source_file            c1ob05708a.txt
_cod_data_source_block           3a
_cod_depositor_comments
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The following automatic conversions were performed:

'_chemical_melting_point' value 'not measured' was changed to '?' -
the value is undefined or not given.

'_symmetry_cell_setting' value
'Hexagonal' changed to 'hexagonal' 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_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_Hall     'P 65 '
_cod_original_sg_symbol_H-M      'P 65 '
_cod_original_formula_sum        ' C23 H22 N2 O4 '
_cod_database_code               7151988