From: Computing phenomenologic Adair-Klotz constants from microscopic MWC parameters
this paper
reported range
K 1
5.1860 × 105
1.16 × 105 [11] – 1.7 × 106 [11]
K 2
5.1601 × 105
1.4 × 105 [11] – 8.9 × 105 [12]
K 3
1.3377 × 105
2.86 × 104 [13] – 2.9 × 106 [11]
K 4
3.8784 × 104
1.7 × 103 [14] – 1.12 × 105 [13]