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. Author manuscript; available in PMC: 2014 Mar 7.
Published in final edited form as: Dalton Trans. 2012 Dec 4;42(9):3071–3081. doi: 10.1039/c2dt32349d

Figure 3.

Figure 3

Multicomponent regression analyses of room temperature 31P chemical shifts in benzene. Left panel: 2a–2g, circles, analysis with phosphine cone angles (eq13) and square, analysis with phosphine oxide cone angles (eq 14). Right panel: 3a, 3c–3e, 3g, circles, analysis with phosphine cone angles (eq 15) and square, analysis with phosphine oxide cone angles (eq 16). δ(31P) = 6.30 (±47) −0.39 (± 0.69)pKa+ 0.50 (±0.36) Θ − 10 (±2.9) Ear (R2=83) eq13; δ(31P) = 71 (± 3.3) − 0.78 (± 0.91)pKa + 0.52 (±0.96) (Θ-Θth)λ − 11 (±5.7) Ear (R2=75) eq14; δ(31P) = 74.5 (± 7.15) − 4.20 (± 12.4) pKa + 8.80 (± 31.0) (Θ-Θth)λ − 38.0 (±104) Ear (R2=65) … eq15; δ(31P) = 799 (±210) +8.62 (±2.79)pKa−6.42 (± 1.86) Θ − 51.5 (±17.8) Ear (R2=97) eq 16.