Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807045187/bt2511sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536807045187/bt2511Isup2.hkl |
CCDC reference: 664188
Anhydrous ammonia was condensed at 195 K (dry ice, iPrOH) onto YpCp3 (4–10 mmol). The resulting colourless mixture was stirred rapidly for 5 h and then further stirred for additional 6 - 24 h without further cooling. After complete evaporation of residual ammonia the pale-coloured solid was dried under vakuum and sublimed under reduced pressure yielding green Cp3YbNH3. Heating of Cp3YbNH3 to 523 K yielded yellow monoclinic [Cp2YbNH2]2. Subsequent treatment of this compound to 250 bar yielded yellow cubic [Cp2YbNH2]2.
The H atoms bonded to C were positioned geometrically and refined using a riding model, C—H = 0.93 A and Uiso(H) = 1.2 Uiso(C). The amino H atom was freely refined.
The stucture of the title compound, [Cp2YbNH2]2, shows the high-pressure cubic modification of the monoclinic compound [Cp2YbNH2]2. The assymetric unit consists of three C atoms, one N atom and one Yb atom (figure 1). Gometric parameters of the title compound are in the usual ranges. It crystalizes isotyp with cubic [Cp2ErNH2]2, which was the only cubic compound of the system [Cp2LnNH2]2 so far.
The monoclinic [Cp2YbNH2]2 complex was first described by Fischer & Fischer (1966). The first single X-ray diffraction data of this compound were presented by Baisch, Pagano, Zeuner, Barros et al. (2006). For related literature, see Schumann et al. (1995); Hayes & Thomas (1989); Hammel & Weidlein (1990); Baisch, Pagano, Zeuner & Schnick (2006).
Data collection: X-AREA (Stoe & Cie, 2002); cell refinement: X-AREA (Stoe & Cie, 2002); data reduction: X-AREA (Stoe & Cie, 2002); program(s) used to solve structure: SHELXS97 (Sheldrick, 1990); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: DIAMOND (Brandenburg 1999); software used to prepare material for publication: SHELXL97 (Sheldrick, 1997).
[Yb2(C5H5)4(NH2)2] | Melting point: not measured K |
Mr = 638.5 | Mo Kα radiation, λ = 0.71073 Å |
Cubic, Im3 | Cell parameters from 6512 reflections |
Hall symbol: -I223 | θ = 4.6–60.9° |
a = 14.4104 (17) Å | µ = 9.32 mm−1 |
V = 2992.5 (6) Å3 | T = 293 K |
Z = 6 | Platelet, yellow |
F(000) = 1788 | 0.22 × 0.17 × 0.12 mm |
Dx = 2.126 Mg m−3 |
Stoe IPDS diffractometer | 843 independent reflections |
Radiation source: fine-focus sealed tube | 578 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.080 |
oscillation scans | θmax = 30.4°, θmin = 2.8° |
Absorption correction: multi-scan correction based on equivalents (XPREP in SHELXTL-Plus; Sheldrick, 1996) | h = −20→20 |
Tmin = 0.160, Tmax = 0.390 | k = −20→20 |
16043 measured reflections | l = −20→20 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.025 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.051 | H atoms treated by a mixture of independent and constrained refinement |
S = 0.87 | w = 1/[σ2(Fo2) + (0.0285P)2] where P = (Fo2 + 2Fc2)/3 |
843 reflections | (Δ/σ)max < 0.001 |
36 parameters | Δρmax = 0.58 e Å−3 |
1 restraint | Δρmin = −0.50 e Å−3 |
[Yb2(C5H5)4(NH2)2] | Z = 6 |
Mr = 638.5 | Mo Kα radiation |
Cubic, Im3 | µ = 9.32 mm−1 |
a = 14.4104 (17) Å | T = 293 K |
V = 2992.5 (6) Å3 | 0.22 × 0.17 × 0.12 mm |
Stoe IPDS diffractometer | 843 independent reflections |
Absorption correction: multi-scan correction based on equivalents (XPREP in SHELXTL-Plus; Sheldrick, 1996) | 578 reflections with I > 2σ(I) |
Tmin = 0.160, Tmax = 0.390 | Rint = 0.080 |
16043 measured reflections |
R[F2 > 2σ(F2)] = 0.025 | 1 restraint |
wR(F2) = 0.051 | H atoms treated by a mixture of independent and constrained refinement |
S = 0.87 | Δρmax = 0.58 e Å−3 |
843 reflections | Δρmin = −0.50 e Å−3 |
36 parameters |
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 > 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. |
x | y | z | Uiso*/Ueq | ||
Yb1 | 0.5000 | 0.12174 (2) | 0.5000 | 0.03854 (11) | |
N1 | 0.5000 | 0.0000 | 0.6022 (4) | 0.0400 (14) | |
C1 | 0.3244 (3) | 0.1320 (4) | 0.4523 (4) | 0.0776 (17) | |
H1 | 0.3009 | 0.0854 | 0.4143 | 0.093* | |
C2 | 0.3644 (4) | 0.2112 (5) | 0.4235 (5) | 0.090 (2) | |
H2 | 0.3739 | 0.2286 | 0.3621 | 0.108* | |
C3 | 0.3888 (6) | 0.2621 (5) | 0.5000 | 0.105 (4) | |
H3 | 0.4167 | 0.3202 | 0.5000 | 0.126* | |
H11 | 0.551 (3) | 0.0000 | 0.638 (4) | 0.07 (2)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Yb1 | 0.03668 (19) | 0.03207 (18) | 0.0469 (2) | 0.000 | 0.000 | 0.000 |
N1 | 0.044 (4) | 0.049 (4) | 0.026 (3) | 0.000 | 0.000 | 0.000 |
C1 | 0.040 (2) | 0.071 (3) | 0.122 (4) | 0.015 (2) | −0.018 (2) | −0.026 (3) |
C2 | 0.068 (4) | 0.103 (5) | 0.100 (5) | 0.034 (4) | −0.004 (3) | 0.036 (4) |
C3 | 0.057 (5) | 0.036 (4) | 0.224 (14) | 0.018 (3) | 0.000 | 0.000 |
Yb1—N1i | 2.291 (4) | Yb1—C1iv | 2.626 (5) |
Yb1—N1 | 2.291 (4) | Yb1—H11 | 2.75 (3) |
Yb1—C3ii | 2.580 (6) | N1—Yb1i | 2.291 (4) |
Yb1—C3 | 2.580 (6) | N1—H11 | 0.894 (10) |
Yb1—C2iii | 2.588 (5) | C1—C2 | 1.344 (8) |
Yb1—C2ii | 2.588 (5) | C1—C1iii | 1.376 (12) |
Yb1—C2 | 2.588 (5) | C1—H1 | 0.9300 |
Yb1—C2iv | 2.588 (5) | C2—C3 | 1.369 (8) |
Yb1—C1iii | 2.626 (5) | C2—H2 | 0.9300 |
Yb1—C1 | 2.626 (5) | C3—C2iii | 1.369 (8) |
Yb1—C1ii | 2.626 (5) | C3—H3 | 0.9300 |
N1i—Yb1—N1 | 80.1 (2) | C2ii—Yb1—C1ii | 29.87 (19) |
N1i—Yb1—C3ii | 126.87 (15) | C2—Yb1—C1ii | 144.2 (2) |
N1—Yb1—C3ii | 126.87 (15) | C2iv—Yb1—C1ii | 49.90 (19) |
N1i—Yb1—C3 | 126.87 (15) | C1iii—Yb1—C1ii | 148.9 (3) |
N1—Yb1—C3 | 126.87 (15) | C1—Yb1—C1ii | 173.6 (2) |
C3ii—Yb1—C3 | 76.8 (4) | N1i—Yb1—C1iv | 82.80 (12) |
N1i—Yb1—C2iii | 130.95 (16) | N1—Yb1—C1iv | 102.21 (14) |
N1—Yb1—C2iii | 96.19 (19) | C3ii—Yb1—C1iv | 50.0 (2) |
C3ii—Yb1—C2iii | 94.5 (3) | C3—Yb1—C1iv | 123.7 (3) |
C3—Yb1—C2iii | 30.72 (18) | C2iii—Yb1—C1iv | 144.2 (2) |
N1i—Yb1—C2ii | 130.95 (16) | C2ii—Yb1—C1iv | 49.90 (19) |
N1—Yb1—C2ii | 96.19 (19) | C2—Yb1—C1iv | 126.0 (2) |
C3ii—Yb1—C2ii | 30.72 (18) | C2iv—Yb1—C1iv | 29.87 (19) |
C3—Yb1—C2ii | 94.5 (3) | C1iii—Yb1—C1iv | 173.6 (2) |
C2iii—Yb1—C2ii | 98.1 (3) | C1—Yb1—C1iv | 148.9 (3) |
N1i—Yb1—C2 | 96.19 (19) | C1ii—Yb1—C1iv | 30.4 (3) |
N1—Yb1—C2 | 130.95 (16) | N1i—Yb1—H11 | 88.7 (8) |
C3ii—Yb1—C2 | 94.5 (3) | N1—Yb1—H11 | 17.5 (5) |
C3—Yb1—C2 | 30.72 (18) | C3ii—Yb1—H11 | 109.6 (4) |
C2iii—Yb1—C2 | 50.4 (3) | C3—Yb1—H11 | 131.6 (12) |
C2ii—Yb1—C2 | 120.2 (3) | C2iii—Yb1—H11 | 102.1 (13) |
N1i—Yb1—C2iv | 96.19 (19) | C2ii—Yb1—H11 | 79.0 (4) |
N1—Yb1—C2iv | 130.95 (16) | C2—Yb1—H11 | 145.7 (12) |
C3ii—Yb1—C2iv | 30.72 (18) | C2iv—Yb1—H11 | 115.2 (10) |
C3—Yb1—C2iv | 94.5 (3) | C1iii—Yb1—H11 | 95.8 (12) |
C2iii—Yb1—C2iv | 120.2 (3) | C1—Yb1—H11 | 118.7 (9) |
C2ii—Yb1—C2iv | 50.4 (3) | C1ii—Yb1—H11 | 65.9 (8) |
C2—Yb1—C2iv | 98.1 (3) | C1iv—Yb1—H11 | 88.3 (12) |
N1i—Yb1—C1iii | 102.21 (14) | Yb1i—N1—Yb1 | 99.9 (2) |
N1—Yb1—C1iii | 82.80 (12) | Yb1i—N1—H11 | 112 (3) |
C3ii—Yb1—C1iii | 123.7 (3) | Yb1—N1—H11 | 112 (3) |
C3—Yb1—C1iii | 50.0 (2) | C2—C1—C1iii | 107.9 (4) |
C2iii—Yb1—C1iii | 29.87 (19) | C2—C1—Yb1 | 73.5 (3) |
C2ii—Yb1—C1iii | 126.0 (2) | C1iii—C1—Yb1 | 74.82 (13) |
C2—Yb1—C1iii | 49.90 (19) | C2—C1—H1 | 126.0 |
C2iv—Yb1—C1iii | 144.2 (2) | C1iii—C1—H1 | 126.0 |
N1i—Yb1—C1 | 82.80 (12) | Yb1—C1—H1 | 117.7 |
N1—Yb1—C1 | 102.21 (14) | C1—C2—C3 | 108.5 (7) |
C3ii—Yb1—C1 | 123.7 (3) | C1—C2—Yb1 | 76.6 (3) |
C3—Yb1—C1 | 50.0 (2) | C3—C2—Yb1 | 74.3 (4) |
C2iii—Yb1—C1 | 49.90 (19) | C1—C2—H2 | 125.8 |
C2ii—Yb1—C1 | 144.2 (2) | C3—C2—H2 | 125.8 |
C2—Yb1—C1 | 29.87 (19) | Yb1—C2—H2 | 115.4 |
C2iv—Yb1—C1 | 126.0 (2) | C2iii—C3—C2 | 107.2 (9) |
C1iii—Yb1—C1 | 30.4 (3) | C2iii—C3—Yb1 | 74.9 (3) |
N1i—Yb1—C1ii | 102.21 (14) | C2—C3—Yb1 | 74.9 (3) |
N1—Yb1—C1ii | 82.80 (12) | C2iii—C3—H3 | 126.4 |
C3ii—Yb1—C1ii | 50.0 (2) | C2—C3—H3 | 126.4 |
C3—Yb1—C1ii | 123.7 (3) | Yb1—C3—H3 | 116.0 |
C2iii—Yb1—C1ii | 126.0 (2) |
Symmetry codes: (i) −x+1, −y, −z+1; (ii) −x+1, y, −z+1; (iii) x, y, −z+1; (iv) −x+1, y, z. |
Experimental details
Crystal data | |
Chemical formula | [Yb2(C5H5)4(NH2)2] |
Mr | 638.5 |
Crystal system, space group | Cubic, Im3 |
Temperature (K) | 293 |
a (Å) | 14.4104 (17) |
V (Å3) | 2992.5 (6) |
Z | 6 |
Radiation type | Mo Kα |
µ (mm−1) | 9.32 |
Crystal size (mm) | 0.22 × 0.17 × 0.12 |
Data collection | |
Diffractometer | Stoe IPDS |
Absorption correction | Multi-scan correction based on equivalents (XPREP in SHELXTL-Plus; Sheldrick, 1996) |
Tmin, Tmax | 0.160, 0.390 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 16043, 843, 578 |
Rint | 0.080 |
(sin θ/λ)max (Å−1) | 0.713 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.025, 0.051, 0.87 |
No. of reflections | 843 |
No. of parameters | 36 |
No. of restraints | 1 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.58, −0.50 |
Computer programs: X-AREA (Stoe & Cie, 2002), SHELXS97 (Sheldrick, 1990), SHELXL97 (Sheldrick, 1997), DIAMOND (Brandenburg 1999).
The stucture of the title compound, [Cp2YbNH2]2, shows the high-pressure cubic modification of the monoclinic compound [Cp2YbNH2]2. The assymetric unit consists of three C atoms, one N atom and one Yb atom (figure 1). Gometric parameters of the title compound are in the usual ranges. It crystalizes isotyp with cubic [Cp2ErNH2]2, which was the only cubic compound of the system [Cp2LnNH2]2 so far.