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_7235616
_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         'C24 H24 O5'
_chemical_formula_sum            'C24 H24 O5'
_chemical_formula_weight         392.43
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2013-07-02T12:33:17-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 91.639(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   20.0985(11)
_cell_length_b                   8.3800(4)
_cell_length_c                   12.1731(6)
_cell_measurement_reflns_used    2313
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      23.29
_cell_measurement_theta_min      2.63
_cell_volume                     2049.42(18)
_computing_data_reduction        'SAINT v7.68A (Bruker, 2009)'
_computing_molecular_graphics
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
        J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_publication_material
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
        J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_structure_refinement
;
        SHELXL, G.M. Sheldrick, Acta Cryst.
        (2008). A64, 112-122
;
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298
_diffrn_measured_fraction_theta_full 0.855
_diffrn_measured_fraction_theta_max 0.855
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0499
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            7127
_diffrn_reflns_theta_full        24.87
_diffrn_reflns_theta_max         24.87
_diffrn_reflns_theta_min         2.63
_diffrn_source                   'fine-focus sealed tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.089
_exptl_absorpt_correction_T_max  0.7451
_exptl_absorpt_correction_T_min  0.6537
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
        SADABS-2008/1 (Bruker,2008) was used for absorption correction.
        wR2(int) was 0.0754 before and 0.0645 after correction.
        The Ratio of minimum to maximum transmission is 0.8773.
        The \l/2 correction factor is 0.0015.
;
_exptl_crystal_density_diffrn    1.272
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             832
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.1
_refine_diff_density_max         1.273
_refine_diff_density_min         -0.573
_refine_diff_density_rms         0.08
_refine_ls_extinction_coef       0.010(8)
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.575
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     263
_refine_ls_number_reflns         3040
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.575
_refine_ls_R_factor_all          0.1312
_refine_ls_R_factor_gt           0.1097
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.2000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.3576
_refine_ls_wR_factor_ref         0.3896
_reflns_number_gt                2200
_reflns_number_total             3040
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ra02174f2.cif
_cod_data_source_block           nm679a
_cod_database_code               7235616