Covalently anchored carboxylic acid on uniform spherical silica nanoparticles with narrow slit like mesopores for the synthesis of pyrroloacridinones: CuI-catalyzed further C(sp3)–H oxyfunctionalization for CO formation
Ray, Suman; Bhaumik, Asim; Pramanik, Malay; Mukhopadhyay, Chhanda; RSC Advances 4 (2014) 15441–; doi:10.1039/c4ra01287a

data_7235534
_publ_section_title
;
 Covalently anchored carboxylic acid on uniform spherical silica
 nanoparticles with narrow slit like mesopores for the synthesis of
 pyrroloacridinones: CuI-catalyzed further C(sp3)--H oxyfunctionalization
 for C&#xE001;O formation
;
_journal_issue                   30
_journal_name_full               'RSC Advances'
_journal_page_first              15441
_journal_paper_doi               10.1039/c4ra01287a
_journal_volume                  4
_journal_year                    2014
_chemical_formula_sum            'C22 H16 N2 O'
_chemical_formula_weight         324.37
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_space_group_name_H-M   'C 1 2/c 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                 99.224(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            16
_cell_length_a                   33.052(6)
_cell_length_b                   7.1765(13)
_cell_length_c                   28.014(5)
_cell_measurement_temperature    296(2)
_cell_volume                     6559(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.985
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0466
_diffrn_reflns_av_sigmaI/netI    0.0450
_diffrn_reflns_limit_h_max       39
_diffrn_reflns_limit_h_min       -36
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            21963
_diffrn_reflns_theta_full        25.23
_diffrn_reflns_theta_max         25.23
_diffrn_reflns_theta_min         1.25
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.992
_exptl_absorpt_correction_T_min  0.990
_exptl_absorpt_correction_type   empirical
_exptl_crystal_density_diffrn    1.314
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             2720
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.669
_refine_diff_density_min         -0.301
_refine_diff_density_rms         0.047
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     455
_refine_ls_number_reflns         5853
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.1040
_refine_ls_R_factor_gt           0.0572
_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^)+(0.0916P)^2^+1.8657P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1509
_refine_ls_wR_factor_ref         0.1802
_reflns_number_gt                3407
_reflns_number_total             5853
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ra01287a2.cif
_cod_data_source_block           a
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               7235534