Tautomerism in Schiff bases. The cases of 2-hydroxy-1-naphthaldehyde and 1-hydroxy-2-naphthaldehyde investigated in solution and the solid state.
Martínez, R Fernando; Avalos, Martín; Babiano, Reyes; Cintas, Pedro; Jiménez, José L; Light, Mark E.; Palacios, Juan C.; Organic & biomolecular chemistry 9 (2011) 8268–8275; doi:10.1039/c1ob06073b

data_7152078
_publ_section_title
;
 Tautomerism in Schiff bases. The cases of 2-hydroxy-1-naphthaldehyde and
 1-hydroxy-2-naphthaldehyde investigated in solution and the solid state.
;
_journal_issue                   24
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              8268
_journal_page_last               8275
_journal_paper_doi               10.1039/c1ob06073b
_journal_volume                  9
_journal_year                    2011
_chemical_compound_source        'Pedro Cintas'
_chemical_formula_sum            'C21 H21 N O'
_chemical_formula_weight         303.39
_chemical_name_common            NAFTBU
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 103.012(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.5131(2)
_cell_length_b                   12.4731(4)
_cell_length_c                   15.8417(5)
_cell_measurement_reflns_used    17297
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     1638.95(8)
_computing_cell_refinement
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
_computing_data_collection       'COLLECT (Hooft, R.W.W., 1998)'
_computing_data_reduction
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
_computing_molecular_graphics
;
Images generated using CrystalMaker: a crystal and molecular
structures program for Mac and Windows. CrystalMaker Software Ltd,
Oxford, England (www.crystalmaker.com)
;
_computing_publication_material  'WINGX (Farrugia, 1998)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker-Nonius CCD camera on \k-goniostat'
_diffrn_measurement_method       '\f & \w scans to fill the asymmetric unit'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Bruker Nonius FR591 Rotating Anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0727
_diffrn_reflns_av_sigmaI/netI    0.0597
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            20079
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.10
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.075
_exptl_absorpt_correction_T_max  0.9955
_exptl_absorpt_correction_T_min  0.9779
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS V2.10 (Sheldrick, G.M., 2003)
;
_exptl_crystal_colour            Orange
_exptl_crystal_density_diffrn    1.230
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             648
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.193
_refine_diff_density_min         -0.268
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.054
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     212
_refine_ls_number_reflns         3746
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.086
_refine_ls_R_factor_all          0.0939
_refine_ls_R_factor_gt           0.0571
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0830P)^2^+0.0946P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1401
_refine_ls_wR_factor_ref         0.1604
_reflns_number_gt                2486
_reflns_number_total             3746
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c1ob06073b.txt
_cod_data_source_block           2010acc0779
_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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7152078