Solvatochromic, Thermochromic and pH-Sensory DCDHF-Hydrazone Molecular Switch: Response to Alkaline Analytes
Khattab, Tawfik A.; Tiu, Brylee David Buada; Adas, Sonya; Bunge, Scott Daniel; Advincula, Rigoberto; RSC Adv.  (2016) –; doi:10.1039/C6RA24113A

data_7226879
_publ_section_title
;
 Solvatochromic, Thermochromic and pH-Sensory DCDHF-Hydrazone Molecular
 Switch: Response to Alkaline Analytes
;
_journal_name_full               'RSC Adv.'
_journal_paper_doi               10.1039/C6RA24113A
_journal_year                    2016
_chemical_formula_moiety         ' C18 H15 N5 O, C2 H6 O'
_chemical_formula_sum            'C20 H21 N5 O2'
_chemical_formula_weight         363.42
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2016-10-20 deposited with the CCDC.
2016-10-21 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.8827(10)
_cell_length_b                   16.544(2)
_cell_length_c                   17.510(2)
_cell_measurement_reflns_used    1830
_cell_measurement_temperature    188(2)
_cell_measurement_theta_max      24.40
_cell_measurement_theta_min      2.33
_cell_volume                     1993.8(4)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      188(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0715
_diffrn_reflns_av_unetI/netI     0.0565
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            16132
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.045
_diffrn_reflns_theta_max         25.045
_diffrn_reflns_theta_min         1.693
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_T_max  0.992
_exptl_absorpt_correction_T_min  0.839
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.211
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             768
_exptl_crystal_size_max          0.100
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.100
_refine_diff_density_max         0.135
_refine_diff_density_min         -0.188
_refine_diff_density_rms         0.037
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.862
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     251
_refine_ls_number_reflns         3535
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.862
_refine_ls_R_factor_all          0.0882
_refine_ls_R_factor_gt           0.0477
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.1000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1193
_refine_ls_wR_factor_ref         0.1496
_reflns_Friedel_coverage         0.726
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                2383
_reflns_number_total             3535
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6ra24113a3.cif
_cod_data_source_block           tk02_06_25_2013_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'MULTI-SCAN' changed to
'multi-scan' according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

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

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 
;
_cod_original_cell_volume        1993.9(5)
_cod_database_code               7226879
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.992
_shelx_estimated_absorpt_t_max   0.992
_shelx_res_checksum              86011