Brønsted acid catalysed eco friendly synthesis of quaternary centred C-3 functionalized oxindole derivatives
Poomathi, Nataraj; Balaji, Ravichandran; Maheswari, Narayanan Uma; Mathivanan, Narayanasamy; Perumal, Paramasivan T.; Balasubramanian, Kalpattu K.; Barathi, Veluchamy Amutha; Ramakrishna, Seeram; New Journal of Chemistry 42 (2018) 14817–; doi:10.1039/C8NJ02276C

data_7057586
_publ_section_title
;
 Br\/onsted acid catalysed eco friendly synthesis of quaternary centred
 C-3 functionalized oxindole derivatives
;
_journal_issue                   18
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              14817
_journal_paper_doi               10.1039/C8NJ02276C
_journal_volume                  42
_journal_year                    2018
_chemical_formula_moiety         'C14 H12 N2 O6'
_chemical_formula_sum            'C14 H12 N2 O6'
_chemical_formula_weight         304.26
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_block_doi                 10.5517/ccdc.csd.cc14pr6s
_audit_creation_method           SHELXL-2014/6
_audit_update_record
;
2016-07-30 deposited with the CCDC.
2018-07-23 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 100.4660(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.5891(4)
_cell_length_b                   7.7739(2)
_cell_length_c                   14.1240(4)
_cell_measurement_reflns_used    2062
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      24.999
_cell_measurement_theta_min      1.995
_cell_volume                     1359.27(7)
_computing_cell_refinement       '<i>SAINT</i> (Bruker, 2008)'
_computing_data_collection       '<i>APEX2</i> (Bruker, 2008)'
_computing_data_reduction        '<i>SAINT</i> (Bruker, 2008)'
_computing_molecular_graphics
;
ORTEP-3 for Windows (Farrugia, 2012) and PLATON (Spek, 2009)  
;
_computing_publication_material
;
SHELXL-2014/7 (Sheldrick, 2015), PLATON (Spek, 2009) and 
publCIF (Westrip, 2010)
;
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXS-2014/7 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker Kappa APEXII CCD diffractometer'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0172
_diffrn_reflns_av_unetI/netI     0.0147
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            10209
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.788
_diffrn_reflns_theta_min         1.995
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.119
_exptl_absorpt_correction_T_max  0.971
_exptl_absorpt_correction_T_min  0.965
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2008)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.487
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             632
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.485
_refine_diff_density_min         -0.396
_refine_diff_density_rms         0.037
_refine_ls_extinction_coef       0.0065(17)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.072
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     215
_refine_ls_number_reflns         2603
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.074
_refine_ls_R_factor_all          0.0483
_refine_ls_R_factor_gt           0.0409
_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^)+(0.0549P)^2^+0.5029P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1100
_refine_ls_wR_factor_ref         0.1158
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2210
_reflns_number_total             2603
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8nj02276c2.cif
_cod_data_source_block           I
_cod_depositor_comments          'Adding full bibliography for 7057586.cif.'
_cod_database_code               7057586
_publcif_datablock.id            {73ee20cc-4684-4119-9d20-f8d7396154eb}
_shelxl_version_number           2014/6
_shelx_res_checksum              57772