National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 22May 2022
NIST Standard Reference Database 101
IIntroduction
IIExperimental data
IIICalculated data
IVData comparisons
VCost comparisons
VIInput and output files
VIITutorials and Units
VIIILinks to other sites
IXFeedback
XOlder CCCBDB versions
XIIGeometries
XIII Vibrations
XIVReaction data
XVEntropy data
XVIBibliographic data
XVIIIon data
XVIIIBad calculations
XIXIndex of properties
XXH-bond dimers
XXIOddities

NIST policy on privacy, security, and accessibility.
© 2013 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved.

The National Institute of Standards and Technology (NIST) is an agency of the U.S. Department of Commerce.

Please send questions, comments, corrections, additions and suggestions to cccbdb@nist.gov.

return to home page

IV.D.8.

Average Bond Length Differences by Model Chemistry

Calculated at CCD/aug-cc-pVTZ

Species Name Bond type Bond Length (Å)
Experimental unc. Calculated Difference atom1 atom2
SiP Silicon monophosphide rSiP 2.078 ±0.002 2.005 -0.073 1 2
FNO2 Nitryl fluoride rNF 1.467 ±0.015 1.415 -0.052 1 2
CN Cyano radical rC#N 1.172   1.130 -0.042 1 2
C2H Ethynyl radical rC#C 1.217   1.178 -0.039 1 2
C2H2O2 Ethanedial rCH 1.132   1.100 -0.032 1 3
F2 Fluorine diatomic rFF 1.412   1.387 -0.025 1 2
CO+ carbon monoxide cation rC=O 1.115 ±0.000 1.091 -0.024 1 2
AsF5 Arsenic pentafluoride rAsF 1.711 ±0.005 1.688 -0.023 1 5
NH2F monofluoroamine rNF 1.433   1.411 -0.022 1 2
LiOH lithium hydroxide rOH 0.969   0.947 -0.022 1 3
NO Nitric oxide rN=O 1.154 ±0.000 1.133 -0.020 1 2
NSe Nitrogen monoselenide rN=Se 1.652   1.632 -0.020 1 2
C4H8O2 Ethyl acetate rCH 1.105   1.085 -0.020 1 7
FO Oxygen monofluoride rFO 1.354   1.335 -0.019 1 2
HOBr Hypobromous acid rBrO 1.834   1.815 -0.019 2 3
C5H8 Ethenylcyclopropane rCH 1.099   1.082 -0.017 1 6
SeO2 Selenium dioxide rSeO 1.607 ±0.001 1.590 -0.017 1 2
HO2 Hydroperoxy radical rOO 1.331   1.314 -0.017 1 2
AsH Arsenic monohydride rAsH 1.535 ±0.001 1.519 -0.016 1 2
H2Cl+ dihydrogen monochloride cation rHCl 1.321 ±0.000 1.305 -0.015 1 2
N3 azide radical rNN 1.181   1.166 -0.015 1 2
SeO Selenium monoxide rSeO 1.639 ±0.001 1.624 -0.015 1 2
SiC silicon monocarbide rCSi 1.722   1.707 -0.015 1 2
HSe Selenium monohydride rSeH 1.475 ±0.010 1.461 -0.014 1 2
HF+ hydrogen fluoride cation rHF 1.014   1.000 -0.014 1 2
HeH+ Helium hydride cation rHHe 0.790   0.776 -0.014 1 2
CH3CH2CHO Propanal rCH 1.103   1.089 -0.014 1 6
H2CSe Selenoformaldehyde rC=Se 1.753   1.740 -0.014 1 2
BN boron nitride rB=N 1.325   1.312 -0.013 1 2
B2H6 Diborane rBH 1.200   1.187 -0.013 1 5
ArH+ Argon hydride cation rArH 1.292 ±0.000 1.279 -0.013 1 2
CH2NH Methanimine rCH 1.103   1.090 -0.013 1 3
HCCl Chloromethylene rCH 1.119 ±0.036 1.106 -0.012 1 3
OCSe Carbonyl selenide rC=O 1.159   1.146 -0.012 1 2
O2 Oxygen diatomic rO=O 1.208   1.196 -0.012 1 2
ClO Monochlorine monoxide rClO 1.596 ±0.001 1.585 -0.011 1 2
HOCl hypochlorous acid rOH 0.973 ±0.002 0.962 -0.011 1 2
O2+ diatomic oxygen cation rOO 1.116   1.106 -0.011 1 2
As2 Arsenic diatomic rAs#As 2.103   2.092 -0.010 1 2
CBrClF2 Methane, bromochlorodifluoro- rCBr 1.932 ±0.004 1.922 -0.010 1 2
ClOF3 Chlorine trifluoride oxide rFCl 1.713 ±0.003 1.703 -0.010 1 4
SiH2Cl2 dichlorosilane rSiH 1.480 ±0.015 1.470 -0.010 1 2
CH3CH2CHO Propanal rCH 1.115   1.105 -0.010 3 10
CH3CH2CHO Propanal rCH 1.105   1.095 -0.010 2 8
BrF Bromine monofluoride rFBr 1.759 ±0.000 1.749 -0.010 1 2
CSe Carbon monoselenide rC=Se 1.676 ±0.000 1.666 -0.010 1 2
As4 Arsenic tetramer rAsAs 2.435   2.425 -0.010 1 2
CH3CHO Acetaldehyde rCH 1.114   1.105 -0.009 1 4
HS+ sulfur monohydride cation rSH 1.374   1.366 -0.009 1 2
KrH+ Protonated Krypton rHKr 1.421 ±0.000 1.413 -0.009 1 2
C3H3NO Oxazole rCO 1.357 ±0.003 1.349 -0.009 1 2
NO+ nitric oxide cation rN=O 1.066   1.057 -0.008 1 2
CH2PH Phosphaethene rCH 1.090 ±0.015 1.082 -0.008 1 3
CH2 Methylene rCH 1.085   1.077 -0.008 1 2
C3H6O 2-Propen-1-ol rCH 1.091 ±0.010 1.083 -0.008 3 9
C3H6O 2-Propen-1-ol rCH 1.092 ±0.010 1.084 -0.008 2 7
GeO Germanium monoxide rOGe 1.625   1.617 -0.008 1 2
CH3NH2 methyl amine rNH 1.018 ±0.001 1.011 -0.007 2 6
NH4+ ammonium cation rHN 1.029 ±0.000 1.021 -0.007 1 2
H2CSe Selenoformaldehyde rHC 1.090   1.083 -0.007 1 3
HOCl hypochlorous acid rClO 1.697 ±0.001 1.690 -0.007 1 3
C2H2O2 Ethanedial rCC 1.526   1.519 -0.007 1 2
CH3NH2 methyl amine rCN 1.471 ±0.003 1.464 -0.007 1 2
FNO2 Nitryl fluoride rN=O 1.180 ±0.005 1.173 -0.007 1 3
HBr+ hydrogen bromide cation rHBr 1.448   1.442 -0.007 1 2
CH2PH Phosphaethene rCH 1.090 ±0.015 1.083 -0.007 1 4
AsF3 Arsenic trifluoride rAsF 1.706 ±0.002 1.699 -0.007 1 2
CH3CH2CHO Propanal rCH 1.096   1.089 -0.007 1 5
CH3CCH propyne rCH 1.096   1.090 -0.006 1 5
B2H6 Diborane rBH 1.320   1.314 -0.006 1 3
C3H6O 2-Propen-1-ol rCH 1.102 ±0.020 1.096 -0.006 1 6
OH Hydroxyl radical rOH 0.970   0.963 -0.006 1 2
CSe2 Carbon diselenide rC=Se 1.692 ±0.000 1.686 -0.006 1 2
NS+ nitrogen sulfide cation rNS 1.440   1.434 -0.006 1 2
CH2CO Ketene rCH 1.083   1.076 -0.006 1 4
GeH germylidene rGeH 1.588   1.582 -0.006 1 2
BeO beryllium oxide rBe=O 1.331   1.325 -0.006 1 2
C2H2+ acetylene cation rC=C 1.253 ±0.001 1.247 -0.006 1 2
C3H3NO Oxazole rCO 1.370 ±0.002 1.364 -0.006 1 5
CF Fluoromethylidyne rCF 1.276   1.271 -0.005 1 2
CH2Br2 dibromomethane rCBr 1.925 ±0.002 1.920 -0.005 1 4
ClOF3 Chlorine trifluoride oxide rFCl 1.603 ±0.004 1.598 -0.005 1 3
CH3NO nitrosomethane rCH 1.094   1.089 -0.005 1 4
CH3CHS Thioacetaldehyde rCH 1.098   1.093 -0.005 2 6
C4H8O2 Ethyl acetate rCC 1.508   1.503 -0.005 1 2
CH2CO Ketene rC=O 1.162   1.157 -0.005 2 3
CHF3 Methane, trifluoro- rCH 1.091 ±0.014 1.086 -0.005 1 2
SCSe Carbon sulfide selenide rC=Se 1.695 ±0.002 1.690 -0.005 1 3
AsH3 Arsine rAsH 1.511 ±0.000 1.507 -0.004 1 2
H2Se Hydrogen selenide rSeH 1.460   1.456 -0.004 1 2
HBr hydrogen bromide rHBr 1.414 ±0.000 1.410 -0.004 1 2
HSiCl Chlorosilylene rSiH 1.525 ±0.005 1.521 -0.004 1 3
Se2 Selenium diatomic rSe=Se 2.166 ±0.001 2.162 -0.004 1 2
CH3CHFCH3 2-Fluoropropane rCH 1.093 ±0.006 1.089 -0.004 4 8
CH3CH2CHO Propanal rCC 1.509   1.505 -0.004 2 3
NH3BF3 Amminetrifluoroboron rBN 1.673   1.669 -0.004 1 2
NH2SH Thiohydroxylamine rSH 1.344 ±0.029 1.340 -0.004 2 3
C4H8O2 Ethyl acetate rCO 1.345   1.342 -0.003 2 3
NO- nitric oxide anion rN=O 1.258 ±0.010 1.255 -0.003 1 2
CH3CHFCH3 2-Fluoropropane rCH 1.094 ±0.005 1.091 -0.003 4 10
C2H2ClF 1-chloro-1-fluoroethylene rCH 1.082 ±0.001 1.079 -0.003 2 5
CH3Br methyl bromide rCBr 1.934 ±0.000 1.931 -0.003 1 2
C3H6 Cyclopropane rCH 1.083   1.080 -0.003 1 4
CH3CHClCH3 Propane, 2-chloro- rCH 1.091   1.088 -0.003 2 5
C4H8 cyclobutane rCH 1.093   1.090 -0.003 1 5
CH3CHS Thioacetaldehyde rCH 1.090   1.087 -0.003 2 5
N2 Nitrogen diatomic rN#N 1.098   1.095 -0.003 1 2
CH2Cl2 Methylene chloride rCH 1.085 ±0.002 1.082 -0.003 1 2
BO boron monoxide rB=O 1.205   1.202 -0.003 1 2
C4H8O2 Ethyl acetate rCC 1.515   1.512 -0.003 5 6
HNCNH diiminomethane rC=N 1.224 ±0.001 1.222 -0.003 1 2
SCSe Carbon sulfide selenide rC=S 1.553 ±0.002 1.550 -0.003 1 2
HO2 Hydroperoxy radical rOH 0.971   0.968 -0.002 1 3
C4H8 cyclobutane rCH 1.091   1.089 -0.002 1 6
OH- hydroxide anion rOH 0.964   0.962 -0.002 1 2
H2CS Thioformaldehyde rC=S 1.611   1.608 -0.002 1 2
CO Carbon monoxide rC#O 1.128 ±0.000 1.126 -0.002 1 2
GeS Germanium monosulfide rS=Ge 2.012 ±0.000 2.010 -0.002 1 2
C3H6O 2-Propen-1-ol rCH 1.096 ±0.030 1.094 -0.002 1 5
CH2CHF Ethene, fluoro- rCH 1.082   1.080 -0.002 1 4
C3H4 cyclopropene rCH 1.088   1.086 -0.002 1 6
CH3CH2CHO Propanal rCC 1.523   1.521 -0.002 1 2
CH3NO nitrosomethane rCH 1.092   1.090 -0.002 1 5
SeCl2 Selenium Dichloride rClSe 2.157 ±0.003 2.155 -0.002 1 2
CN- cyanide anion rC#N 1.177 ±0.004 1.175 -0.002 1 2
C3H4O Cyclopropanone rCC 1.575   1.573 -0.002 3 4
AsF Arsenic monofluoride rFAs 1.736 ±0.001 1.735 -0.001 1 2
CH3CSNH2 Ethanethioamide rC=S 1.647 ±0.002 1.646 -0.001 1 2
C4H8O2 Ethyl acetate rC=O 1.203   1.202 -0.001 2 4
C2H2 Acetylene rCH 1.063   1.062 -0.001 1 3
C2H2 Acetylene rC#C 1.203   1.202 -0.001 1 2
CH Methylidyne rCH 1.120   1.119 -0.001 1 2
C3H3NO Oxazole rCH 1.075 ±0.001 1.074 -0.001 4 7
COBr2 Carbonic dibromide rC=O 1.172 ±0.003 1.171 -0.001 1 2
GeH3F monofluorogermane rGeF 1.731 ±0.000 1.730 -0.001 1 2
CHONH2 formamide rNH 1.001   1.000 -0.001 3 6
C3H3NO Oxazole rCH 1.073 ±0.001 1.073 0.000 5 8
DF Hydrofluoric acid-d rDF 0.917 ±0.000 0.917 0.000 1 2
F2SO Thionyl Fluoride rFS 1.585 ±0.000 1.585 0.000 1 3
C3H3NO Oxazole rCH 1.075 ±0.001 1.075 0.000 2 6
He2+ helium diatomic cation rHeHe 1.081 ±0.001 1.081 0.000 1 2
GeF+ Germanium monofluoride cation rFGe 1.665 ±0.000 1.665 0.000 1 2
CH3CHS Thioacetaldehyde rCH 1.089   1.089 0.000 1 4
H2O Water rOH 0.958 ±0.000 0.958 0.000 1 2
PN Phosphorus mononitride rP#N 1.491   1.491 0.000 1 2
CH3CHClCH3 Propane, 2-chloro- rCH 1.092   1.092 0.000 3 6
BH3 boron trihydride rBH 1.190   1.190 0.000 1 2
CH3CHFCH3 2-Fluoropropane rCH 1.092   1.092 0.000 1 3
C2H6O2S Dimethyl sulfone rCS 1.777 ±0.006 1.777 0.000 1 4
HF Hydrogen fluoride rHF 0.917 ±0.000 0.917 0.000 1 2
GeF Germanium monofluoride rFGe 1.745   1.746 0.000 1 2
SiH3F monofluorosilane rSiH 1.476   1.477 0.001 1 3
PO- phosphorus monoxide anion rOP 1.540   1.541 0.001 1 2
CHF3 Methane, trifluoro- rCF 1.328 ±0.003 1.329 0.001 1 3
C2H2+ acetylene cation rCH 1.077 ±0.005 1.077 0.001 1 3
HOBr Hypobromous acid rOH 0.961   0.962 0.001 1 2
CH2F2 Methane, difluoro- rCF 1.351 ±0.001 1.352 0.001 1 4
HCl+ hydrogen chloride cation rHCl 1.315   1.316 0.001 1 2
C2 Carbon diatomic rC=C 1.243   1.243 0.001 1 2
CH3CHO Acetaldehyde rCH 1.086   1.087 0.001 2 5
SF4 Sulfur tetrafluoride rSF 1.646 ±0.003 1.647 0.001 1 2
SiH3Cl chlorosilane rSiH 1.475   1.476 0.001 1 3
H2 Hydrogen diatomic rHH 0.741   0.742 0.001 1 2
BH Boron monohydride rBH 1.232   1.234 0.001 1 2
CH4 Methane rCH 1.087 ±0.001 1.088 0.001 1 2
HCl Hydrogen chloride rHCl 1.275 ±0.000 1.276 0.001 1 2
HCCl Chloromethylene rCCl 1.696 ±0.003 1.697 0.001 1 2
C5H8 Ethenylcyclopropane rCC 1.475   1.476 0.001 1 2
CH3Br methyl bromide rCH 1.082 ±0.001 1.084 0.001 1 3
C3H4 cyclopropene rCH 1.072   1.073 0.001 2 4
ClF Chlorine monofluoride rFCl 1.628 ±0.000 1.630 0.001 1 2
CH3CCH propyne rCH 1.060   1.062 0.002 3 4
SO+ sulfur monoxide cation rO=S 1.424   1.426 0.002 1 2
SiH4 Silane rSiH 1.480 ±0.000 1.482 0.002 1 2
BF Boron monofluoride rBF 1.267 ±0.000 1.269 0.002 1 2
GaF Gallium monofluoride rFGa 1.774 ±0.000 1.776 0.002 1 2
HS- mercapto anion rSH 1.343   1.345 0.002 1 2
OCSe Carbonyl selenide rC=Se 1.709   1.711 0.002 1 3
CHONH2 formamide rNH 1.001   1.003 0.002 3 5
CH3NH2 methyl amine rCH 1.093 ±0.000 1.095 0.002 1 3
CH2CHF Ethene, fluoro- rCH 1.077   1.079 0.002 2 5
HS Mercapto radical rSH 1.341   1.343 0.002 1 2
OPCl Phosphorus oxychloride rP=O 1.462 ±0.011 1.465 0.003 1 2
PO Phosphorus monoxide rP=O 1.476   1.479 0.003 1 2
CH3CHFCH3 2-Fluoropropane rCH 1.088 ±0.006 1.091 0.003 4 6
P2 Phosphorus diatomic rP#P 1.893   1.896 0.003 1 2
CH2Cl2 Methylene chloride rCCl 1.767 ±0.002 1.770 0.003 1 4
GeH3F monofluorogermane rGeH 1.515 ±0.000 1.518 0.003 1 3
C3H6O 2-Propen-1-ol rCH 1.078 ±0.010 1.081 0.003 3 8
BF3 Borane, trifluoro- rBF 1.307   1.310 0.003 1 2
SO Sulfur monoxide rS=O 1.481   1.484 0.003 1 2
S2+ sulfur diatomic cation rS=S 1.825 ±0.010 1.828 0.003 1 2
SF Monosulfur monofluoride rSF 1.599   1.603 0.003 1 2
SSO Disulfur monoxide rS=O 1.456   1.460 0.004 1 2
PH phosphorus monohydride rPH 1.422   1.426 0.004 1 2
BrO Bromine monoxide rOBr 1.718   1.721 0.004 1 2
SF4 Sulfur tetrafluoride rSF 1.545 ±0.003 1.549 0.004 1 4
SiO Silicon monoxide rSiO 1.510 ±0.000 1.514 0.004 1 2
BeH beryllium monohydride rBeH 1.343   1.347 0.004 1 2
CH2F2 Methane, difluoro- rCH 1.084 ±0.003 1.088 0.004 1 2
C3H6 Cyclopropane rCC 1.501   1.505 0.004 1 2
SiH+ silicon monohydride cation rSiH 1.504   1.509 0.005 1 2
NS Mononitrogen monosulfide rNS 1.497 ±0.000 1.502 0.005 1 2
SiH Silylidyne rSiH 1.520   1.526 0.006 1 2
BeH2 beryllium dihydride rBeH 1.326 ±0.000 1.332 0.006 1 2
SiH3+ Silyl cation rSiH 1.460 ±0.010 1.466 0.006 1 2
SSO Disulfur monoxide rS=S 1.884   1.890 0.006 2 3
NH2CONH2 Urea rNH 0.998   1.005 0.007 4 8
AsF5 Arsenic pentafluoride rAsF 1.656 ±0.004 1.663 0.007 1 2
SiH2F2 difluorosilane rSiH 1.462   1.468 0.007 1 4
SiS silicon monosulfide rSiS 1.929 ±0.000 1.937 0.007 1 2
PF2 Phosphorus difluoride rPF 1.579   1.587 0.007 1 2
C3O2 Carbon suboxide rC=O 1.146   1.154 0.008 2 4
GaBr Gallium monobromide rGaBr 2.352 ±0.000 2.361 0.008 1 2
GaAs Gallium arsenide rGa#As 2.530 ±0.020 2.539 0.009 1 2
PF+ phosphorus monofluoride cation rFP 1.500   1.510 0.009 1 2
S2 Sulfur diatomic rS=S 1.889   1.900 0.011 1 2
Br2 Bromine diatomic rBrBr 2.281   2.292 0.011 1 2
GeCl Germanium monochloride rClGe 2.164 ±0.000 2.175 0.011 1 2
F2SO Thionyl Fluoride rO=S 1.413 ±0.000 1.423 0.011 1 2
MgH magnesium monohydride rMgH 1.730   1.741 0.011 1 2
LiNH2 lithium amide rLiN 1.736 ±0.003 1.747 0.011 1 2
SiF silicon monofluoride rSiF 1.604   1.616 0.012 1 2
SiH3F monofluorosilane rSiF 1.595   1.606 0.012 1 2
Cl2+ chlorine diatomic cation rClCl 1.892   1.904 0.013 1 2
BrCl Bromine monochloride rClBr 2.136 ±0.000 2.149 0.013 1 2
SiBr+ Silicon monobromide cation rSiBr 2.095 ±0.000 2.108 0.013 1 2
AlNC Aluminum isocyanide rAlN 1.855 ±0.005 1.868 0.013 1 2
LiOH lithium hydroxide rLiO 1.582   1.595 0.014 1 2
ScH Scandium monohydride rScH 1.775 ±0.000 1.789 0.014 1 2
B2 Boron diatomic rBB 1.590   1.604 0.014 1 2
SiF2 Silicon difluoride rFSi 1.590 ±0.000 1.604 0.014 1 2
C2H Ethynyl radical rCH 1.047   1.061 0.014 1 3
LiH Lithium Hydride rLiH 1.595 ±0.000 1.609 0.014 1 2
OPCl Phosphorus oxychloride rPCl 2.059 ±0.004 2.073 0.015 1 3
C3H5 Allyl radical rCH 1.069   1.084 0.015 1 2
C2H6O2S Dimethyl sulfone rS=O 1.431 ±0.004 1.446 0.015 1 2
MgH+ magnesium monohydride cation rMgH 1.652   1.667 0.015 1 2
LiO lithium oxide rLiO 1.688   1.704 0.016 1 2
HSSSH trisulfane rSS 2.054 ±0.000 2.071 0.017 1 2
SiH3Cl chlorosilane rSiCl 2.051   2.068 0.018 1 2
AlF Aluminum monofluoride rAlF 1.654 ±0.000 1.673 0.019 1 2
SCl2 Sulfur dichloride rSCl 2.013 ±0.001 2.032 0.019 1 2
SiH2Cl2 dichlorosilane rSiCl 2.033 ±0.003 2.053 0.020 1 4
Cl2 Chlorine diatomic rClCl 1.988   2.008 0.020 1 2
LiF lithium fluoride rLiF 1.564 ±0.000 1.584 0.020 1 2
NCl nitrogen monochloride rNCl 1.611 ±0.000 1.632 0.021 1 2
SiCl Clorosilylidyne rSiCl 2.061 ±0.000 2.083 0.022 1 2
C3O2 Carbon suboxide rC=C 1.251   1.273 0.022 1 2
SCl sulfur monochloride rSCl 1.975   1.999 0.023 1 2
LiBr Lithium Bromide rLiBr 2.170 ±0.000 2.194 0.024 1 2
LiCl lithium chloride rLiCl 2.021 ±0.000 2.045 0.024 1 2
HSiCl Chlorosilylene rSiCl 2.067 ±0.003 2.092 0.025 1 2
PS phosphorus sulfide rP=S 1.900   1.925 0.025 1 2
AlCl Aluminum monochloride rAlCl 2.130 ±0.000 2.157 0.027 1 2
CFCl chlorofluoromethylene rCCl 1.714   1.743 0.029 1 3
AlBr Aluminum monobromide rAlBr 2.295   2.324 0.029 1 2
Li2 Lithium diatomic rLiLi 2.673   2.703 0.030 1 2
AlC Aluminum carbide rC=Al 1.955   1.986 0.031 1 2
CuH Copper monohydride rCuH 1.463   1.494 0.032 1 2
NaH sodium hydride rNaH 1.887 ±0.000 1.925 0.038 1 2
TiCl Titanium Monochloride rClTi 2.265 ±0.000 2.304 0.039 1 2
NaCl Sodium Chloride rNaCl 2.361 ±0.000 2.409 0.048 1 2
NaF sodium fluoride rNaF 1.926 ±0.000 1.989 0.063 1 2
NaLi lithium sodium rLiNa 2.889   2.952 0.063 1 2
C4H8O2 Ethyl acetate rCO 1.448   1.512 0.064 5 6
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 ±0.040 2.279 0.239 1 3
267 molecules.