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_7235617
_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_sum            'C26 H28 O6'
_chemical_formula_weight         436.48
_space_group_crystal_system      orthorhombic
_space_group_IT_number           60
_space_group_name_Hall           '-P 2n 2ab'
_space_group_name_H-M_alt        'P b c n'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2014-04-03T17:38:51-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   18.8390(8)
_cell_length_b                   13.5066(6)
_cell_length_c                   9.0088(3)
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      21.38
_cell_measurement_theta_min      2.93
_cell_volume                     2292.30(16)
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.978
_diffrn_measured_fraction_theta_max 1
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.069
_diffrn_reflns_Laue_measured_fraction_full 0.978
_diffrn_reflns_Laue_measured_fraction_max 1
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            9702
_diffrn_reflns_point_group_measured_fraction_full 0.978
_diffrn_reflns_point_group_measured_fraction_max 1
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.024
_diffrn_reflns_theta_min         1.855
_exptl_absorpt_coefficient_mu    0.089
_exptl_absorpt_correction_T_max  0.7462
_exptl_absorpt_correction_T_min  0.6072
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
        SADABS-2008/1 (Bruker,2008) was used for absorption correction.
        wR2(int) was 0.0970 before and 0.0839 after correction.
        The Ratio of minimum to maximum transmission is 0.8137.
        The \l/2 correction factor is 0.0015.
;
_exptl_crystal_density_diffrn    1.265
_exptl_crystal_F_000             928
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.298
_refine_diff_density_min         -0.374
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.065
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     158
_refine_ls_number_reflns         2031
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.149
_refine_ls_R_factor_all          0.085
_refine_ls_R_factor_gt           0.0567
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0806P)^2^+0.6957P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1564
_refine_ls_wR_factor_ref         0.177
_reflns_number_gt                1357
_reflns_number_total             2031
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c4ra02174f2.cif
_cod_data_source_block           6c
_cod_database_code               7235617