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In the title compound, [Hf(C2H5)2(C13H23N2Si2)2], the Hf atom is coordinated by two ethyl groups and two bis­(tri­methyl­silyl)­benzamidinate (siam) ligands binding in a bidentate coordination mode via their N-donor atoms. The coordination around hafnium is best described as slightly distorted tetra­hedral if the siam ligands are represented by their centroids.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536806005721/om2003sup1.cif
Contains datablocks global, I

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S1600536806005721/om2003Isup2.hkl
Contains datablock I

CCDC reference: 601226

Key indicators

  • Single-crystal X-ray study
  • T = 183 K
  • Mean [sigma](C-C) = 0.013 Å
  • R factor = 0.041
  • wR factor = 0.110
  • Data-to-parameter ratio = 19.8

checkCIF/PLATON results

No syntax errors found



Datablock: I


Alert level A PLAT027_ALERT_3_A _diffrn_reflns_theta_full (too) Low ............ 24.64 Deg.
Alert level C THETM01_ALERT_3_C The value of sine(theta_max)/wavelength is less than 0.590 Calculated sin(theta_max)/wavelength = 0.5866 PLAT023_ALERT_3_C Resolution (too) Low [sin(th)/Lambda < 0.6]..... 24.64 Deg. PLAT220_ALERT_2_C Large Non-Solvent C Ueq(max)/Ueq(min) ... 2.97 Ratio PLAT242_ALERT_2_C Check Low Ueq as Compared to Neighbors for Si1 PLAT242_ALERT_2_C Check Low Ueq as Compared to Neighbors for Si2 PLAT242_ALERT_2_C Check Low Ueq as Compared to Neighbors for Si3 PLAT242_ALERT_2_C Check Low Ueq as Compared to Neighbors for Si4 PLAT342_ALERT_3_C Low Bond Precision on C-C bonds (x 1000) Ang ... 13 PLAT369_ALERT_2_C Long C(sp2)-C(sp2) Bond C1 - C2 ... 1.53 Ang. PLAT602_ALERT_4_C VERY LARGE Solvent Accessible VOID(S) in Structure !
1 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 10 ALERT level C = Check and explain 0 ALERT level G = General alerts; check 0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 6 ALERT type 2 Indicator that the structure model may be wrong or deficient 4 ALERT type 3 Indicator that the structure quality may be low 1 ALERT type 4 Improvement, methodology, query or suggestion

Computing details top

Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1994); cell refinement: SET4 (de Boer & Duisenberg, 1984); data reduction: MolEN (Enraf–Nonius, 1990); program(s) used to solve structure: SHELXS86 (Sheldrick, 1990); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: XP (Siemens, 1990); software used to prepare material for publication: SHELXL97.

Bis[N,N'-bis(trimethylsilyl)benzamidinato]diethylhafnium(IV) top
Crystal data top
[Hf(C2H5)2(C13H23N2Si2)2]F(000) = 1568
Mr = 763.64Dx = 1.182 Mg m3
Monoclinic, P21/nMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P2ynCell parameters from 25 reflections
a = 12.205 (2) Åθ = 18.5–20.1°
b = 20.790 (4) ŵ = 2.54 mm1
c = 17.234 (3) ÅT = 183 K
β = 101.00 (3)°Cuboid, colorless
V = 4292.6 (13) Å30.12 × 0.08 × 0.08 mm
Z = 4
Data collection top
Enraf–Nonius CAD-4
diffractometer
5285 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tubeRint = 0.039
Graphite monochromatorθmax = 24.6°, θmin = 2.5°
ω/2–θ scansh = 140
Absorption correction: ψ scan
(North et al., 1968)
k = 024
Tmin = 0.747, Tmax = 0.813l = 1920
7584 measured reflections3 standard reflections every 600 min
7229 independent reflections intensity decay: 2.2%
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.041Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.110H-atom parameters constrained
S = 1.21 w = 1/[σ2(Fo2) + (0.0435P)2 + 17.7042P]
where P = (Fo2 + 2Fc2)/3
7229 reflections(Δ/σ)max = 0.001
366 parametersΔρmax = 0.95 e Å3
0 restraintsΔρmin = 0.78 e Å3
Special details top

Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.

Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 &gt; σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
Hf10.16156 (2)0.371892 (14)0.890536 (17)0.02855 (10)
N10.3101 (5)0.3346 (3)0.8441 (4)0.0349 (14)
C10.3381 (6)0.3936 (4)0.8271 (4)0.0343 (17)
N20.2637 (5)0.4401 (3)0.8290 (4)0.0357 (14)
C20.4523 (6)0.4074 (4)0.8063 (4)0.0367 (17)
C30.5354 (7)0.4338 (5)0.8628 (5)0.056 (2)
H30.52200.44260.91310.067*
C40.6389 (8)0.4472 (5)0.8446 (6)0.071 (3)
H40.69470.46480.88300.085*
C50.6594 (7)0.4350 (4)0.7717 (6)0.057 (2)
H50.72910.44420.76010.068*
C60.5763 (7)0.4087 (4)0.7143 (6)0.057 (2)
H60.59000.40040.66400.068*
C70.4716 (6)0.3946 (4)0.7323 (5)0.046 (2)
H70.41570.37670.69420.055*
Si10.38080 (18)0.26238 (11)0.85062 (14)0.0413 (5)
C80.2914 (9)0.2046 (4)0.8925 (7)0.074 (3)
H8A0.32410.16250.89450.111*
H8B0.21840.20360.85970.111*
H8C0.28560.21790.94490.111*
C90.3943 (9)0.2307 (5)0.7514 (6)0.074 (3)
H9A0.43820.19210.75790.111*
H9B0.43020.26230.72420.111*
H9C0.32150.22140.72120.111*
C100.5221 (8)0.2671 (5)0.9123 (7)0.081 (3)
H10A0.56810.29450.88710.121*
H10B0.55420.22480.91870.121*
H10C0.51730.28450.96320.121*
Si20.2656 (2)0.52126 (11)0.80587 (15)0.0463 (6)
C110.3599 (10)0.5420 (5)0.7358 (7)0.085 (4)
H11A0.35240.58690.72270.128*
H11B0.33990.51680.68850.128*
H11C0.43580.53300.76020.128*
C120.1221 (8)0.5421 (5)0.7545 (6)0.070 (3)
H12A0.12310.58280.72840.104*
H12B0.07390.54470.79240.104*
H12C0.09500.50950.71610.104*
C130.3079 (8)0.5690 (4)0.8973 (6)0.065 (3)
H13A0.29650.61390.88540.097*
H13B0.38530.56140.91880.097*
H13C0.26370.55640.93530.097*
N30.0294 (5)0.3042 (3)0.9181 (3)0.0351 (14)
C140.0022 (5)0.2892 (3)0.8430 (4)0.0312 (16)
N40.0472 (5)0.3205 (3)0.7915 (3)0.0341 (14)
C150.0883 (6)0.2381 (4)0.8155 (5)0.0404 (18)
C160.0595 (7)0.1738 (4)0.8228 (5)0.052 (2)
H160.01300.16220.84600.062*
C170.1363 (9)0.1271 (5)0.7964 (6)0.071 (3)
H170.11590.08400.80180.085*
C180.2437 (9)0.1436 (6)0.7616 (7)0.078 (3)
H180.29540.11170.74250.094*
C190.2735 (8)0.2059 (6)0.7554 (6)0.071 (3)
H190.34670.21670.73340.085*
C200.1964 (6)0.2551 (5)0.7815 (5)0.054 (2)
H200.21760.29810.77610.064*
Si30.01994 (18)0.27927 (11)1.00247 (13)0.0423 (5)
C210.0741 (9)0.2157 (5)1.0512 (6)0.074 (3)
H21A0.06760.17831.01790.112*
H21B0.05390.20471.10080.112*
H21C0.14970.23091.06050.112*
C220.0175 (8)0.3488 (4)1.0691 (5)0.058 (2)
H22A0.05210.33731.11270.087*
H22B0.05750.38401.04060.087*
H22C0.05840.36151.08860.087*
C230.1665 (9)0.2502 (7)0.9817 (6)0.092 (4)
H23A0.19150.24361.03060.138*
H23B0.17050.21030.95310.138*
H23C0.21320.28160.95060.138*
Si40.02677 (19)0.31386 (12)0.68967 (13)0.0444 (6)
C240.1440 (8)0.3548 (5)0.6574 (5)0.059 (3)
H24A0.13540.35170.60100.088*
H24B0.21290.33480.68190.088*
H24C0.14500.39920.67260.088*
C250.0235 (10)0.2284 (5)0.6558 (6)0.087 (4)
H25A0.04040.22660.60360.130*
H25B0.04950.21070.65480.130*
H25C0.07780.20390.69140.130*
C260.1029 (8)0.3558 (6)0.6430 (6)0.091 (4)
H26A0.11350.35150.58660.137*
H26B0.09720.40060.65690.137*
H26C0.16530.33720.66140.137*
C270.0637 (6)0.4585 (4)0.9150 (5)0.044 (2)
H27A0.06360.45990.97120.053*
H27B0.10200.49670.90180.053*
C280.0585 (7)0.4612 (4)0.8701 (7)0.066 (3)
H28A0.09390.49910.88570.099*
H28B0.09770.42370.88240.099*
H28C0.05980.46270.81430.099*
C290.2607 (7)0.3572 (4)1.0141 (5)0.051 (2)
H29A0.21130.36201.05170.062*
H29B0.28970.31361.01870.062*
C300.3567 (9)0.4037 (5)1.0353 (6)0.073 (3)
H30A0.38600.40131.09100.080*
H30B0.33090.44661.02170.080*
H30C0.41420.39271.00660.080*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Hf10.02409 (14)0.03094 (16)0.03047 (16)0.00067 (15)0.00483 (10)0.00339 (15)
N10.033 (3)0.028 (3)0.045 (4)0.001 (3)0.011 (3)0.004 (3)
C10.030 (4)0.039 (4)0.033 (4)0.004 (3)0.003 (3)0.006 (3)
N20.036 (3)0.033 (3)0.041 (4)0.001 (3)0.014 (3)0.001 (3)
C20.033 (4)0.035 (4)0.046 (5)0.000 (3)0.016 (3)0.009 (4)
C30.044 (5)0.075 (7)0.050 (5)0.013 (5)0.012 (4)0.023 (5)
C40.042 (5)0.087 (8)0.085 (8)0.014 (5)0.017 (5)0.029 (6)
C50.041 (5)0.052 (5)0.086 (7)0.012 (4)0.034 (5)0.018 (5)
C60.055 (5)0.057 (6)0.070 (6)0.015 (5)0.041 (5)0.015 (5)
C70.039 (4)0.050 (5)0.050 (5)0.010 (4)0.014 (4)0.012 (4)
Si10.0387 (12)0.0371 (12)0.0503 (14)0.0080 (10)0.0139 (10)0.0012 (10)
C80.091 (8)0.041 (5)0.105 (9)0.013 (5)0.056 (7)0.015 (5)
C90.098 (8)0.056 (6)0.078 (7)0.009 (6)0.037 (6)0.009 (5)
C100.063 (6)0.065 (7)0.106 (9)0.025 (5)0.002 (6)0.002 (6)
Si20.0489 (13)0.0315 (12)0.0627 (15)0.0028 (10)0.0210 (12)0.0027 (11)
C110.103 (9)0.052 (6)0.116 (10)0.009 (6)0.060 (8)0.028 (6)
C120.082 (7)0.048 (6)0.077 (7)0.008 (5)0.011 (6)0.017 (5)
C130.061 (6)0.038 (5)0.096 (8)0.012 (4)0.018 (5)0.016 (5)
N30.036 (3)0.034 (3)0.035 (4)0.001 (3)0.008 (3)0.002 (3)
C140.025 (3)0.030 (4)0.038 (4)0.002 (3)0.004 (3)0.010 (3)
N40.036 (3)0.035 (3)0.030 (3)0.007 (3)0.002 (3)0.006 (3)
C150.033 (4)0.048 (5)0.041 (4)0.008 (4)0.009 (3)0.001 (4)
C160.052 (5)0.036 (5)0.070 (6)0.004 (4)0.019 (4)0.009 (4)
C170.084 (7)0.042 (5)0.091 (7)0.022 (6)0.030 (6)0.019 (6)
C180.077 (8)0.074 (8)0.082 (8)0.039 (6)0.011 (6)0.012 (6)
C190.046 (5)0.101 (9)0.060 (6)0.026 (6)0.004 (5)0.004 (6)
C200.035 (5)0.063 (6)0.060 (6)0.006 (4)0.003 (4)0.001 (5)
Si30.0427 (12)0.0470 (13)0.0391 (12)0.0057 (10)0.0126 (10)0.0029 (10)
C210.112 (9)0.062 (6)0.057 (6)0.014 (6)0.035 (6)0.018 (5)
C220.078 (6)0.058 (6)0.046 (5)0.001 (5)0.031 (5)0.007 (4)
C230.073 (7)0.143 (12)0.072 (7)0.035 (7)0.043 (6)0.011 (7)
Si40.0467 (13)0.0528 (14)0.0322 (12)0.0106 (11)0.0040 (10)0.0042 (10)
C240.066 (6)0.072 (7)0.042 (5)0.017 (5)0.016 (4)0.004 (4)
C250.131 (10)0.076 (8)0.060 (7)0.035 (7)0.035 (7)0.019 (6)
C260.067 (7)0.150 (12)0.051 (6)0.005 (7)0.006 (5)0.040 (7)
C270.047 (5)0.038 (4)0.051 (5)0.004 (4)0.019 (4)0.011 (4)
C280.038 (5)0.043 (5)0.116 (9)0.004 (4)0.014 (5)0.013 (5)
C290.045 (5)0.072 (6)0.037 (4)0.000 (4)0.006 (4)0.000 (4)
C300.088 (8)0.067 (7)0.051 (6)0.020 (6)0.017 (5)0.002 (5)
Geometric parameters (Å, º) top
Hf1—C272.244 (7)C14—N41.334 (9)
Hf1—C292.261 (8)C14—C151.505 (10)
Hf1—N12.255 (6)N4—Si41.731 (6)
Hf1—N42.256 (5)C15—C201.383 (11)
Hf1—N32.258 (6)C15—C161.382 (11)
Hf1—N22.279 (6)C16—C171.367 (12)
Hf1—C12.634 (7)C16—H160.9300
Hf1—C142.646 (7)C17—C181.376 (15)
N1—C11.320 (9)C17—H170.9300
N1—Si11.725 (6)C18—C191.345 (15)
C1—N21.331 (9)C18—H180.9300
C1—C21.531 (10)C19—C201.404 (12)
N2—Si21.735 (6)C19—H190.9300
C2—C71.366 (10)C20—H200.9300
C2—C31.379 (11)Si3—C211.845 (10)
C3—C41.386 (12)Si3—C221.843 (9)
C3—H30.9300Si3—C231.857 (10)
C4—C51.351 (12)C21—H21A0.9600
C4—H40.9300C21—H21B0.9600
C5—C61.387 (12)C21—H21C0.9600
C5—H50.9300C22—H22A0.9600
C6—C71.402 (10)C22—H22B0.9600
C6—H60.9300C22—H22C0.9600
C7—H70.9300C23—H23A0.9600
Si1—C101.848 (10)C23—H23B0.9600
Si1—C81.858 (9)C23—H23C0.9600
Si1—C91.868 (10)Si4—C241.839 (9)
C8—H8A0.9600Si4—C261.851 (10)
C8—H8B0.9600Si4—C251.869 (10)
C8—H8C0.9600C24—H24A0.9600
C9—H9A0.9600C24—H24B0.9600
C9—H9B0.9600C24—H24C0.9600
C9—H9C0.9600C25—H25A0.9600
C10—H10A0.9600C25—H25B0.9600
C10—H10B0.9600C25—H25C0.9600
C10—H10C0.9600C26—H26A0.9600
Si2—C131.851 (9)C26—H26B0.9600
Si2—C121.857 (10)C26—H26C0.9600
Si2—C111.871 (10)C27—C281.544 (11)
C11—H11A0.9600C27—H27A0.9700
C11—H11B0.9600C27—H27B0.9700
C11—H11C0.9600C28—H28A0.9600
C12—H12A0.9600C28—H28B0.9600
C12—H12B0.9600C28—H28C0.9600
C12—H12C0.9600C29—C301.509 (12)
C13—H13A0.9600C29—H29A0.9700
C13—H13B0.9600C29—H29B0.9700
C13—H13C0.9600C30—H30A0.9600
N3—C141.316 (9)C30—H30B0.9600
N3—Si31.755 (6)C30—H30C0.9600
C27—Hf1—C2998.1 (3)H13A—C13—H13C109.5
C27—Hf1—N1146.6 (3)H13B—C13—H13C109.5
C29—Hf1—N188.0 (3)C14—N3—Si3131.5 (5)
C27—Hf1—N4104.3 (3)C14—N3—Hf191.6 (4)
C29—Hf1—N4142.3 (3)Si3—N3—Hf1136.9 (3)
N1—Hf1—N489.6 (2)N3—C14—N4116.9 (6)
C27—Hf1—N391.9 (3)N3—C14—C15122.2 (7)
C29—Hf1—N389.6 (3)N4—C14—C15120.9 (6)
N1—Hf1—N3121.1 (2)N3—C14—Hf158.5 (4)
N4—Hf1—N360.0 (2)N4—C14—Hf158.5 (3)
C27—Hf1—N286.9 (3)C15—C14—Hf1175.4 (5)
C29—Hf1—N2106.3 (3)C14—N4—Si4129.7 (5)
N1—Hf1—N260.0 (2)C14—N4—Hf191.3 (4)
N4—Hf1—N2104.9 (2)Si4—N4—Hf1138.9 (3)
N3—Hf1—N2164.1 (2)C20—C15—C16119.4 (8)
C27—Hf1—C1116.6 (3)C20—C15—C14120.4 (7)
C29—Hf1—C194.7 (3)C16—C15—C14120.2 (7)
N1—Hf1—C130.1 (2)C17—C16—C15120.7 (9)
N4—Hf1—C1101.8 (2)C17—C16—H16119.7
N3—Hf1—C1150.2 (2)C15—C16—H16119.7
N2—Hf1—C130.4 (2)C16—C17—C18120.3 (10)
C27—Hf1—C14100.5 (2)C16—C17—H17119.9
C29—Hf1—C14116.2 (3)C18—C17—H17119.9
N1—Hf1—C14106.1 (2)C19—C18—C17119.7 (9)
N4—Hf1—C1430.3 (2)C19—C18—H18120.2
N3—Hf1—C1429.8 (2)C17—C18—H18120.2
N2—Hf1—C14135.1 (2)C18—C19—C20121.5 (10)
C1—Hf1—C14127.7 (2)C18—C19—H19119.3
C1—N1—Si1132.5 (5)C20—C19—H19119.3
C1—N1—Hf191.1 (4)C15—C20—C19118.4 (9)
Si1—N1—Hf1134.6 (3)C15—C20—H20120.8
N1—C1—N2117.6 (6)C19—C20—H20120.8
N1—C1—C2120.8 (6)N3—Si3—C21107.9 (4)
N2—C1—C2121.7 (7)N3—Si3—C22108.4 (3)
N1—C1—Hf158.8 (4)C21—Si3—C22110.1 (5)
N2—C1—Hf159.9 (4)N3—Si3—C23114.0 (4)
C2—C1—Hf1169.2 (5)C21—Si3—C23110.3 (6)
C1—N2—Si2131.4 (5)C22—Si3—C23106.0 (5)
C1—N2—Hf189.8 (4)Si3—C21—H21A109.5
Si2—N2—Hf1138.1 (3)Si3—C21—H21B109.5
C7—C2—C3120.1 (7)H21A—C21—H21B109.5
C7—C2—C1120.6 (7)Si3—C21—H21C109.5
C3—C2—C1119.3 (7)H21A—C21—H21C109.5
C2—C3—C4120.0 (8)H21B—C21—H21C109.5
C2—C3—H3120.0Si3—C22—H22A109.5
C4—C3—H3120.0Si3—C22—H22B109.5
C5—C4—C3120.7 (9)H22A—C22—H22B109.5
C5—C4—H4119.6Si3—C22—H22C109.5
C3—C4—H4119.6H22A—C22—H22C109.5
C4—C5—C6119.8 (8)H22B—C22—H22C109.5
C4—C5—H5120.1Si3—C23—H23A109.5
C6—C5—H5120.1Si3—C23—H23B109.5
C5—C6—C7119.8 (8)H23A—C23—H23B109.5
C5—C6—H6120.1Si3—C23—H23C109.5
C7—C6—H6120.1H23A—C23—H23C109.5
C2—C7—C6119.6 (8)H23B—C23—H23C109.5
C2—C7—H7120.2N4—Si4—C24107.4 (3)
C6—C7—H7120.2N4—Si4—C26110.4 (4)
N1—Si1—C10113.0 (4)C24—Si4—C26107.5 (5)
N1—Si1—C8105.4 (4)N4—Si4—C25112.5 (4)
C10—Si1—C8111.3 (5)C24—Si4—C25108.5 (5)
N1—Si1—C9112.2 (4)C26—Si4—C25110.3 (6)
C10—Si1—C9108.0 (5)Si4—C24—H24A109.5
C8—Si1—C9106.8 (5)Si4—C24—H24B109.5
Si1—C8—H8A109.5H24A—C24—H24B109.5
Si1—C8—H8B109.5Si4—C24—H24C109.5
H8A—C8—H8B109.5H24A—C24—H24C109.5
Si1—C8—H8C109.5H24B—C24—H24C109.5
H8A—C8—H8C109.5Si4—C25—H25A109.5
H8B—C8—H8C109.5Si4—C25—H25B109.5
Si1—C9—H9A109.5H25A—C25—H25B109.5
Si1—C9—H9B109.5Si4—C25—H25C109.5
H9A—C9—H9B109.5H25A—C25—H25C109.5
Si1—C9—H9C109.5H25B—C25—H25C109.5
H9A—C9—H9C109.5Si4—C26—H26A109.5
H9B—C9—H9C109.5Si4—C26—H26B109.5
Si1—C10—H10A109.5H26A—C26—H26B109.5
Si1—C10—H10B109.5Si4—C26—H26C109.5
H10A—C10—H10B109.5H26A—C26—H26C109.5
Si1—C10—H10C109.5H26B—C26—H26C109.5
H10A—C10—H10C109.5C28—C27—Hf1115.7 (5)
H10B—C10—H10C109.5C28—C27—H27A108.4
N2—Si2—C13109.9 (4)Hf1—C27—H27A108.4
N2—Si2—C12106.5 (4)C28—C27—H27B108.4
C13—Si2—C12111.4 (5)Hf1—C27—H27B108.4
N2—Si2—C11114.2 (4)H27A—C27—H27B107.4
C13—Si2—C11108.7 (5)C27—C28—H28A109.5
C12—Si2—C11106.2 (5)C27—C28—H28B109.5
Si2—C11—H11A109.5H28A—C28—H28B109.5
Si2—C11—H11B109.5C27—C28—H28C109.5
H11A—C11—H11B109.5H28A—C28—H28C109.5
Si2—C11—H11C109.5H28B—C28—H28C109.5
H11A—C11—H11C109.5C30—C29—Hf1113.1 (6)
H11B—C11—H11C109.5C30—C29—H29A109.0
Si2—C12—H12A109.5Hf1—C29—H29A109.0
Si2—C12—H12B109.5C30—C29—H29B109.0
H12A—C12—H12B109.5Hf1—C29—H29B109.0
Si2—C12—H12C109.5H29A—C29—H29B107.8
H12A—C12—H12C109.5C29—C30—H30A109.5
H12B—C12—H12C109.5C29—C30—H30B109.5
Si2—C13—H13A109.5H30A—C30—H30B109.5
Si2—C13—H13B109.5C29—C30—H30C109.5
H13A—C13—H13B109.5H30A—C30—H30C109.5
Si2—C13—H13C109.5H30B—C30—H30C109.5
 

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