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Bond Length differences between CCSD(T)=FULL (all electrons correlated) and CCSD(T) (frozen core)

For C2 atoms 1 and 2

For C2 (Carbon diatomic)
Bond length differences (full - frozen) in Å
Methods with standard basis sets
6-31G* cc-pVDZ cc-pVTZ aug-cc-pVDZ aug-cc-pVTZ cc-pCVDZ cc-pCVTZ
Coupled Cluster CCSD(T)=FULL -0.0014 -0.0009 -0.0053 -0.0009 -0.0064 -0.0009 -0.0022