PH₃-PH-PH₂-PH-PH₃

q_P (100 GPa): +1.12 +0.25 +0.70 +0.25 +1.12 q_H (av.) = −0.34

q_P (150 GPa): +1.15 +0.30 +0.75 +0.30 +1.15 q_H (av.) = −0.37