Catalytic 2,3,4-hexatriene formation by terminal alkyne coupling at calcium.
Barrett, Anthony G M; Crimmin, Mark R; Hill, Michael S; Hitchcock, Peter B; Lomas, Sarah L; Procopiou, Panayiotis A; Suntharalingam, Kogularamanan; Chemical communications (Cambridge, England) 34 (2009) 2299–2301; doi:10.1039/b818848c

data_7104349
_publ_section_title
;
 Catalytic 2,3,4-hexatriene formation by terminal alkyne coupling at
 calcium.
;
_journal_issue                   17
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              2299
_journal_page_last               2301
_journal_paper_doi               10.1039/b818848c
_journal_volume                  34
_journal_year                    2009
_chemical_formula_sum            'C58.4 H89.6 Ca N6 O2'
_chemical_formula_weight         947.84
_chemical_name_systematic
;
?
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_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                 121.19
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   44.3151(3)
_cell_length_b                   12.43580(10)
_cell_length_c                   24.4870(2)
_cell_measurement_reflns_used    69907
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      2.910
_cell_volume                     11544.16(15)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Bruker AXS BV, 1997-2004)'
_computing_data_reduction
'Denzo & Scalepack (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'ORTEX (P.McArdle, 1995)'
_computing_publication_material  'SHELXL-97/2 (Sheldrick,1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  '95mm CCD camera on \k-goniostat'
_diffrn_measurement_method       CCD
_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  0.0867
_diffrn_reflns_av_sigmaI/netI    0.0430
_diffrn_reflns_limit_h_max       57
_diffrn_reflns_limit_h_min       -57
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            100189
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.68
_exptl_absorpt_coefficient_mu    0.152
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.81
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
multi-scan from symmetry-related measurements
Sortav (Blessing 1995)
;
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.091
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             4144
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.566
_refine_diff_density_min         -0.425
_refine_diff_density_rms         0.050
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     673
_refine_ls_number_reflns         13169
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      1.067
_refine_ls_R_factor_all          0.0765
_refine_ls_R_factor_gt           0.0499
_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^)+(0.0758P)^2^+8.1209P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1348
_refine_ls_wR_factor_ref         0.1533
_reflns_number_gt                9551
_reflns_number_total             13169
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b818848c.txt
_cod_data_source_block           h08msh17
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Multi-Scan' changed
to 'multi-scan' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      C2/c
_cod_original_formula_sum        'C58.40 H89.60 Ca N6 O2'
_cod_database_code               7104349