Anisotropy factors at 310 (±1) nm under atmospheric pressure (g3100.1 MPa) and overall pressure susceptivities of g310 (Δg/ΔP) for MUJ1–MUJ3 in various solvents.
| Solvent | E T a | g 310 0.1 MPa (×103)b | Δg/ΔPc (TPa−1) | ||||
|---|---|---|---|---|---|---|---|
| MUJ1 | MUJ2 | MUJ3 | MUJ1 | MUJ2 | MUJ3 | ||
| n-H | 30.9 | −0.2 | +0.6 | +3.4 | −0.7 | +1.4 | −2.6 |
| MCHd | ∼31 | +4.1 | +3.7 | +4.9 | +0.6 | +1.5 | +0.9 |
| CTCd | 32.5 | +1.7 | +2.0 | +2.2 | −5.1e | −4.8e | −4.7e |
| THFd | 37.4 | −1.9 | +1.2 | +3.1 | −4.9 | −2.0 | −7.1 |
| EA | 38.1 | −1.2 | +2.3 | +2.4 | +3.4 | +2.4 | −0.2 |
| CHLd | 39.1 | −0.8 | +3.4 | +0.8 | −0.0 | −2.8f | −2.9 |
| DCM | 41.1 | −3.6 | −1.9 | −3.9 | +3.0 | +5.9 | +3.0 |
| AN | 46.0 | −3.4 | −1.6 | −3.7 | +3.5 | +15.6 | +4.2 |
Reichardt's empirical solvent polarity parameter.
Positive (negative) g3100.1 MPa factor indicates preference for the in (out) conformer at atmospheric pressure.
Δg/ΔP = (g310Pmax − g310Pmin)/(Pmax − Pmin); the pressure range applied (ΔP): 0.1–320 MPa, unless noted otherwise. Positive (negative) Δg/ΔP value means equilibrium shift to the in-(Rp) (out-(Sp)) conformer upon pressurization.
Too bulky to be fully accommodated in the P[5] cavity (4.7 Å i.d.).55–58
ΔP: 0.1–160 MPa.
ΔP: 0.1–200 MPa.