(+/-)-2-Aza-3,9-dioxotricyclo[4.4.4.0^1,6^]tetradecane: dimeric and catemeric hydrogen bonding in two polymorphs of a propellanoid keto lactam
Zwege, Daniel; Thompson, Hugh W.; Brunskill, Andrew P. J.; Lalancette, Roger A.; Acta Crystallographica Section C 55 (1999) 1370–1373; doi:10.1107/S0108270199004485

data_2008776
_publ_section_title
;
 (+/-)-2-Aza-3,9-dioxotricyclo[4.4.4.0^1,6^]tetradecane: dimeric and
 catemeric hydrogen bonding in two polymorphs of a propellanoid keto
 lactam
;
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              1370
_journal_page_last               1373
_journal_paper_doi               10.1107/S0108270199004485
_journal_volume                  55
_journal_year                    1999
_chemical_formula_sum            'C13 H19 N O2'
_chemical_formula_weight         221.29
_chemical_melting_point          437
_chemical_name_systematic
;
(+-)-2-Aza-3,9-dioxotricyclo[4.4.4.0^1,6^]tetradecane
;
_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'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.620(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.135(2)
_cell_length_b                   7.626(2)
_cell_length_c                   13.580(2)
_cell_measurement_reflns_used    32
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      12.17
_cell_measurement_theta_min      6.18
_cell_volume                     1153.1(4)
_computing_cell_refinement       'XSCANS (Siemens,  1996)'
_computing_data_collection       'XSCANS (Fait, 1991)'
_computing_data_reduction        XSCANS
_computing_molecular_graphics    SHELXL-97
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       'Siemens P4'
_diffrn_measurement_method       '2\q/\q scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.033
_diffrn_reflns_av_sigmaI/netI    0.054
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -1
_diffrn_reflns_number            3507
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.83
_diffrn_standards_decay_%
;
No decay. Variation < 1
;
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.991
_exptl_absorpt_correction_T_min  0.969
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'XPREP (Sheldrick, 1997)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.275
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'Rectangular prism'
_exptl_crystal_F_000             480
_exptl_crystal_size_max          0.92
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.503
_refine_diff_density_min         -0.215
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.03
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     149
_refine_ls_number_reflns         2653
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.03
_refine_ls_R_factor_all          0.100
_refine_ls_R_factor_gt           0.060
_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^)+(0.0483P)^2^+0.6911P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.151
_reflns_number_gt                1712
_reflns_number_total             2653
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fg1543.cif
_cod_data_source_block           II
_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 

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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2008776