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Tetra­methyl­lead, [Pb(CH3)4], crystallizes in the cubic space group Pa\overline 3, with the Pb atom and one C atom on a crystallographic threefold axis. The average Pb-C distance is 2.211 (11) Å. The crystal structure is isostructural with that of the Sn analogue, and adopts the SnI4-type structure.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536802022201/ya6144sup1.cif
Contains datablocks global, I

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S1600536802022201/ya6144Isup2.hkl
Contains datablock I

CCDC reference: 202969

Key indicators

  • Single-crystal X-ray study
  • T = 150 K
  • Mean [sigma](Pb-C) = 0.008 Å
  • R factor = 0.033
  • wR factor = 0.105
  • Data-to-parameter ratio = 33.9

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry


Red Alert Alert Level A:
ABSTM_02 Alert A Crystal and compound unsuitable for non-numerical corrections. Product of mu and tmid > 3.0 Value of mu given = 24.070 tmid = 0.400
Author response: See _publ_section_exptl_prep

Amber Alert Alert Level B:
CRYSS_02 Alert B The value of _exptl_crystal_size_max is > 1.0 Maximum crystal size given = 3.000
Author response: See _publ_section_exptl_prep

1 Alert Level A = Potentially serious problem
1 Alert Level B = Potential problem
0 Alert Level C = Please check

Computing details top

Data collection: SMART (Bruker, 2001); cell refinement: SAINT (Bruker, 2002); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: CRYSTALS (Watkin et al., 2001); molecular graphics: CAMERON (Watkin et al., 1996); software used to prepare material for publication: CRYSTALS.

Tetramethyl lead top
Crystal data top
[Pb(CH3)4]Melting point: 243 K
Mr = 267.34Mo Kα radiation, λ = 0.71073 Å
Cubic, Pa3Cell parameters from 3546 reflections
Hall symbol: -P 2ac 2ab 3θ = 3–28.5°
a = 11.1725 (6) ŵ = 24.07 mm1
V = 1394.60 (13) Å3T = 150 K
Z = 8Cylinder, colourless
F(000) = 944.003.00 × 0.40 × 0.40 × 0.20 (radius) mm
Dx = 2.546 Mg m3
Data collection top
Bruker SMART APEX CCD
diffractometer
375 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.062
ω scansθmax = 28.6°, θmin = 3.2°
Absorption correction: multi-scan
[SADABS (Sheldrick, 2002) based on the method of Blessing (1995)]
h = 1314
Tmin = 0.111, Tmax = 1.000k = 1414
7703 measured reflectionsl = 714
586 independent reflections
Refinement top
Refinement on F2Hydrogen site location: inferred from neighbouring sites
Least-squares matrix: fullH-atom parameters not refined
R[F2 > 2σ(F2)] = 0.033 Method = Tukey and Prince (Carruthers & Watkin, 1979) W = [weight][1-(deltaF/6σF)2]
where [weight] is given by a five-term Chebychev polynomial with coefficients: 96.4 162. 107. 51.2 13.7
wR(F2) = 0.105(Δ/σ)max < 0.001
S = 1.07Δρmax = 1.55 e Å3
577 reflectionsΔρmin = 1.84 e Å3
17 parametersExtinction correction: Larson (1970), equation 22
Primary atom site location: structure-invariant direct methodsExtinction coefficient: 139.0 (122)
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
Pb10.872030 (14)0.372030 (14)0.127970 (14)0.0145
C10.7586 (8)0.2586 (8)0.2414 (8)0.0258
C20.9865 (8)0.2561 (6)0.0148 (5)0.0224
H110.70710.31090.29210.0315*
H211.03900.30650.03700.0254*
H221.03820.20430.06750.0254*
H230.93530.20350.03630.0254*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Pb10.0145 (3)0.0145 (3)0.0145 (3)0.00001 (6)0.00001 (6)0.00001 (6)
C10.026 (2)0.026 (2)0.026 (2)0.002 (3)0.002 (3)0.002 (3)
C20.027 (3)0.018 (3)0.021 (2)0.003 (2)0.005 (3)0.007 (2)
Geometric parameters (Å, º) top
Pb1—C12.194 (15)C2—H221.008
Pb1—C22.216 (7)C2—H230.999
C2—H210.998C1—H110.997
C2—Pb1—C1108.96 (16)Pb1—C2—H23109.858
C2—Pb1—C2i109.98 (16)H21—C2—H23109.669
Pb1—C2—H21109.906H22—C2—H23108.937
Pb1—C2—H22109.458Pb1—C1—H11108.908
H21—C2—H22108.993H11—C1—H11i110.029
Symmetry code: (i) y+1/2, z+1/2, x+1.
 

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