Guanidinate-stabilized monomeric hafnium amide complexes as promising precursors for MOCVD of HfO2.
Milanov, Andrian; Bhakta, Raghunandan; Baunemann, Arne; Becker, Hans-Werner; Thomas, Reji; Ehrhart, Peter; Winter, Manuela; Devi, Anjana; Inorganic chemistry 45 (2006) 11008–11018; doi:10.1021/ic061056i

data_4350517
_publ_section_title
;
 Guanidinate-stabilized monomeric hafnium amide complexes as promising
 precursors for MOCVD of HfO2.
;
_journal_issue                   26
_journal_name_full               'Inorganic chemistry'
_journal_page_first              11008
_journal_page_last               11018
_journal_paper_doi               10.1021/ic061056i
_journal_volume                  45
_journal_year                    2006
_chemical_formula_sum            'C26 H60 Hf N8'
_chemical_formula_weight         663.31
_chemical_name_systematic
; 
 bis-(ethylmethylamido)-bis-(N,N-diisopropyl-2-ethylmethylamido-guanidinato) 
hafnium(IV)
;
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_H-M   'P b c a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   10.8082(5)
_cell_length_b                   17.5942(10)
_cell_length_c                   33.6626(19)
_cell_measurement_reflns_used    7664
_cell_measurement_temperature    105(2)
_cell_measurement_theta_max      25.06
_cell_measurement_theta_min      3.05
_cell_volume                     6401.3(6)
_computing_cell_refinement       'CrysAlis RED 1.171.13, Oxford Diffraction'
_computing_data_collection       'CrysAlis CCD 1.171.13, Oxford Diffraction'
_computing_data_reduction        'CrysAlis RED 1.171.13, Oxford Diffraction'
_computing_molecular_graphics    SHELXL-97
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      105(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Sapphire2-CCD, Oxford Diffraction'
_diffrn_measurement_method       '1109 images at 1.0 deg. in \w and 20 sec.'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1734
_diffrn_reflns_av_sigmaI/netI    0.1012
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       40
_diffrn_reflns_limit_l_min       -40
_diffrn_reflns_number            80460
_diffrn_reflns_theta_full        25.06
_diffrn_reflns_theta_max         25.06
_diffrn_reflns_theta_min         3.05
_exptl_absorpt_coefficient_mu    3.286
_exptl_absorpt_correction_T_max  0.811
_exptl_absorpt_correction_T_min  0.724
_exptl_absorpt_correction_type   'numerical analytical'
_exptl_absorpt_process_details   'Gaussian face-indexed'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.377
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             2752
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.06
_refine_diff_density_max         2.711
_refine_diff_density_min         -4.208
_refine_diff_density_rms         0.160
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.261
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     307
_refine_ls_number_reflns         5634
_refine_ls_number_restraints     14
_refine_ls_restrained_S_all      1.260
_refine_ls_R_factor_all          0.1705
_refine_ls_R_factor_gt           0.0998
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0000P)^2^+126.9396P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1568
_refine_ls_wR_factor_ref         0.1802
_reflns_number_gt                3591
_reflns_number_total             5634
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic061056isi20060613_055714.cif
_cod_data_source_block           cvd67
_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               4350517