Interplay between steric and electronic factors in determining the strength of intramolecular N—H···O resonance-assisted hydrogen bonds in β-enaminones
V. Bertolasi; L. Pretto; V. Ferretti; P. Gilli; G. Gilli; Acta Crystallographica Section B 62 (2006) 1112–1120; doi:10.1107/S0108768106036421

data_2100683
_publ_section_title
;
 Interplay between steric and electronic factors in determining the
 strength of intramolecular N---H&#x00B7;&#x00B7;&#x00B7;O
 resonance-assisted hydrogen bonds in \b-enaminones
;
_journal_coeditor_code           BK5040
_journal_date_accepted           2006-09-21
_journal_date_recd_electronic    2006-07-10
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              1112
_journal_page_last               1120
_journal_paper_category          FA
_journal_paper_doi               10.1107/S0108768106036421
_journal_volume                  62
_journal_year                    2006
_chemical_formula_moiety         'C15 H17 N O3'
_chemical_formula_sum            'C15 H17 N O3'
_chemical_formula_weight         259.30
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 107.3120(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.0608(3)
_cell_length_b                   6.64070(10)
_cell_length_c                   14.4581(3)
_cell_measurement_reflns_used    7564
_cell_measurement_temperature    150
_cell_measurement_theta_max      30.0
_cell_measurement_theta_min      1.8
_cell_volume                     1288.85(4)
_computing_cell_refinement       'Denzo SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'Kappa CCD Server Software (Nonius, 1997)'
_computing_data_reduction        'Denzo SMN (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'ORTEP III (Burnett & Johnson, 1996)'
_computing_publication_material
;
SHELXL-97 (Sheldrick, 1997), PARST (Nardelli, 1995), PLATON (Spek, 2002)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR97 (Altomare et al., 1999)'
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       '\f scans and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.0280
_diffrn_reflns_av_sigmaI/netI    0.0237
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            11215
_diffrn_reflns_theta_full        30.01
_diffrn_reflns_theta_max         30.0
_diffrn_reflns_theta_min         1.8
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.336
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Irregular
_exptl_crystal_F_000             552
_exptl_crystal_size_max          0.43
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.314
_refine_diff_density_min         -0.216
_refine_ls_extinction_method     none
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_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0361P)^2^+0.7763P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1122
_refine_ls_wR_factor_ref         0.1229
_reflns_number_gt                3285
_reflns_number_total             3749
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            bk5040.cif
_cod_data_source_block           5
_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/n'
_cod_database_code               2100683