Variable-Temperature X-ray Crystallographic and DFT Computational Study of the NH...O/N...HO Tautomeric Competition in 1-(Arylazo)-2-naphthols. Outline of a Transiton-State Hydrogen-Bond Theory
Paola Gilli; Valerio Bertolasi; Loretta Pretto; Liudmil Antonov; Gastone Gilli; Journal of the American Chemical Society 127 (2005) 4943–4953; doi:10.1021/ja0453984

data_4111586
_publ_section_title
;
 Variable-Temperature X-ray Crystallographic and DFT Computational Study
 of the NH...O/N...HO Tautomeric Competition in 1-(Arylazo)-2-naphthols.
 Outline of a Transiton-State Hydrogen-Bond Theory
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              4943
_journal_page_last               4953
_journal_paper_doi               10.1021/ja0453984
_journal_volume                  127
_journal_year                    2005
_chemical_formula_moiety         'C18 H17 N3 O'
_chemical_formula_sum            'C18 H17 N3 O'
_chemical_formula_weight         291.35
_chemical_name_systematic
;
 ?
;
_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                 98.641(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.6238(1)
_cell_length_b                   8.0124(1)
_cell_length_c                   24.4421(5)
_cell_measurement_reflns_used    7799
_cell_measurement_temperature    200
_cell_measurement_theta_max      28.0
_cell_measurement_theta_min      1.7
_cell_volume                     1476.10(4)
_computing_cell_refinement       'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1998)'
_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)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR97 (Altomare et al., 1999)'
_diffrn_ambient_temperature      200
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  '\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  0.021
_diffrn_reflns_av_sigmaI/netI    0.0347
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            7799
_diffrn_reflns_theta_full        28.00
_diffrn_reflns_theta_max         28.0
_diffrn_reflns_theta_min         1.7
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.311
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             616
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.182
_refine_diff_density_min         -0.180
_refine_diff_density_rms         0.036
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.101
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     270
_refine_ls_number_reflns         3566
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.101
_refine_ls_R_factor_all          0.0866
_refine_ls_R_factor_gt           0.0447
_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^)+(0.0460P)^2^+0.4537P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0992
_refine_ls_wR_factor_ref         0.1331
_reflns_number_gt                2330
_reflns_number_total             3566
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            ja0453984si20040730_091303.cif
_cod_data_source_block           3-t200
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4111586