National Institute of Standards and Technology

Computational Chemistry Comparison and Benchmark DataBase
Release 22	May 2022
NIST Standard Reference Database 101

I	Introduction
II	Experimental data
III	Calculated data
IV	Data comparisons
V	Cost comparisons
VI	Input and output files
VII	Tutorials and Units
VIII	Links to other sites
IX	Feedback
X	Older CCCBDB versions
XII	Geometries
XIII	Vibrations
XIV	Reaction data
XV	Entropy data
XVI	Bibliographic data
XVII	Ion data
XVIII	Bad calculations
XIX	Index of properties
XX	H-bond dimers
XXI	Oddities

---

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.

IV.D.4. (XII.A.2.)

Compare Bonds

18 10 19 16 31

TPSSh/6-31G(2df,p) for rAlCl

Histogram of Bond length differences (in Å) vs number of species

Differences greater than 0.400 are in the 0.400 bin. Differences less than -0.200 are in the -0.200 bin.

	10
	8
	6
	4
	2
	0
		-0.200			-0.150			-0.100			-0.050			0.000			0.050			0.100			0.150			0.200			0.250			0.300			0.350			0.400
bond length difference calc. - exp. (Å)

	Species	Name	Difference (Å)
Most negative difference	Al2Cl6	Aluminum, di-μ-chlorotetrachlorodi-	-0.153
Most positive difference	AlCl	Aluminum monochloride	0.289

Bond lengths
Click on entry for experimental details.

Species	Name	Experimental (Å)	Difference (Å)
Al2Cl6	Aluminum, di-μ-chlorotetrachlorodi-	2.240	-0.153
AlCl3	Aluminum trichloride	2.060	0.021
Al2Cl6	Aluminum, di-μ-chlorotetrachlorodi-	2.040	0.246
AlCl	Aluminum monochloride	2.130	0.289