Reactions of 2,4-hexadiyne-1,6-diol with [H2Os3(CO)9(PR3)] clusters. Cyclization of the diyne and reversible exchange of the phosphine ligands between different positions of the "Os3C3" framework.
Tunik, Sergey P.; Khripun, Vassily D.; Haukka, Matti; Pakkanen, Tapani A.; Dalton transactions (Cambridge, England : 2003)  (2004) 1775–1782; doi:10.1039/b403861b

data_7014226
_publ_section_title
;
 Reactions of 2,4-hexadiyne-1,6-diol with [H2Os3(CO)9(PR3)] clusters.
 Cyclization of the diyne and reversible exchange of the phosphine
 ligands between different positions of the "Os3C3" framework.
;
_journal_issue                   11
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1775
_journal_page_last               1782
_journal_paper_doi               10.1039/b403861b
_journal_year                    2004
_chemical_formula_sum            'C21 H21 O10 Os3 P'
_chemical_formula_weight         1034.95
_chemical_name_common            Os3(CO)9(C6H6O)(PEt3)
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     heavy
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 97.3000(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.33170(10)
_cell_length_b                   15.5444(2)
_cell_length_c                   15.7323(2)
_cell_measurement_temperature    140(2)
_cell_volume                     2506.13(5)
_computing_cell_refinement       'Denzo/Scalepack (Otwinowski & Minor, 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction        'Denzo/Scalepack (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'XP in SHELXTL v.6.12 (Bruker AXS, 2001)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'DIRDIF99 (Beurskens et al., 1999)'
_diffrn_ambient_temperature      140(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.919
_diffrn_measured_fraction_theta_max 0.919
_diffrn_measurement_device       '95mm CCD camera on \k-goniostat'
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       CCD
_diffrn_radiation_monochromator  'horizonally mounted graphite crystal'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0547
_diffrn_reflns_av_sigmaI/netI    0.0323
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            31146
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         2.62
_exptl_absorpt_coefficient_mu    15.289
_exptl_absorpt_correction_T_max  0.17688
_exptl_absorpt_correction_T_min  0.06670
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Xprep in Shelxtl v.6.12 (Bruker AXS, 2001)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    2.743
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1880
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         1.121
_refine_diff_density_min         -1.492
_refine_diff_density_rms         0.177
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.112
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     320
_refine_ls_number_reflns         5284
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.112
_refine_ls_R_factor_all          0.0330
_refine_ls_R_factor_gt           0.0270
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0204P)^2^+8.8475P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0587
_refine_ls_wR_factor_ref         0.0607
_reflns_number_gt                4699
_reflns_number_total             5284
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b403861b.txt
_cod_data_source_block           VIII
_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.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7014226