Glaser–Eglinton–Hay sp–sp coupling and macrocyclization: construction of a new class of polyether macrocycles having a 1,3-diyne unit
Naveen, Naveen; Babu, Srinivasarao Arulananda; Kaur, Gurpreet; Aslam, Nayyar Ahmad; Karanam, Maheswararao; RSC Adv. 4 (2014) 18904–; doi:10.1039/C4RA02174F

data_7235611
_publ_section_title
;
 Glaser--Eglinton--Hay sp--sp coupling and macrocyclization: construction
 of a new class of polyether macrocycles having a 1,3-diyne unit
;
_journal_issue                   36
_journal_name_full               'RSC Adv.'
_journal_page_first              18904
_journal_paper_doi               10.1039/C4RA02174F
_journal_volume                  4
_journal_year                    2014
_chemical_formula_moiety         'C28 H20 O6'
_chemical_formula_sum            'C28 H20 O6'
_chemical_formula_weight         452.44
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2014-02-17T21:37:22-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 97.626(13)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.383(3)
_cell_length_b                   11.543(3)
_cell_length_c                   17.587(5)
_cell_measurement_temperature    298(2)
_cell_volume                     2290.4(11)
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.969
_diffrn_measured_fraction_theta_max 0.985
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.049
_diffrn_reflns_Laue_measured_fraction_full 0.969
_diffrn_reflns_Laue_measured_fraction_max 0.985
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            18779
_diffrn_reflns_point_group_measured_fraction_full 0.969
_diffrn_reflns_point_group_measured_fraction_max 0.985
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.095
_diffrn_reflns_theta_min         1.805
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_T_max  0.7523
_exptl_absorpt_correction_T_min  0.5433
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
        SADABS-2008/1 (Bruker,2008) was used for absorption correction.
        wR2(int) was 0.1098 before and 0.0781 after correction.
        The Ratio of minimum to maximum transmission is 0.7079.
        The \l/2 correction factor is 0.0015.
;
_exptl_crystal_density_diffrn    1.312
_exptl_crystal_F_000             944
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.146
_refine_diff_density_min         -0.191
_refine_diff_density_rms         0.034
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.018
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     307
_refine_ls_number_reflns         4022
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.018
_refine_ls_R_factor_all          0.0603
_refine_ls_R_factor_gt           0.0391
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0555P)^2^+0.2197P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0972
_refine_ls_wR_factor_ref         0.1095
_reflns_number_gt                2955
_reflns_number_total             4022
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c4ra02174f2.cif
_cod_data_source_block           5i_nm1174ra
_cod_original_cell_volume        2290.2(11)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7235611