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. 2023 Jun 27;9(7):e17608. doi: 10.1016/j.heliyon.2023.e17608

Table 4.

Geometrical parameters of π⋅⋅⋅π stacking interactions for H2L4 and C–H⋅⋅⋅π contacts for the complex 4 (Å, °).

H2L4
Rings I–Ja,b,l Cg(I)⋅⋅⋅Cg(J)c γ d Cg(I)-perpe Cg(J)-perpf
Cg(1)⋅⋅⋅Cg(2)i 3.885(2) 23.6 3.5599(14) 3.5966(16)
Cg(1)⋅⋅⋅Cg(2)ii 4.096(2) 30.8 −3.5198(14) −3.9255(16)
Cg(2)⋅⋅⋅Cg(1)i 3.885(2) 22.2 3.5966(16) 3.5600(14)
Cg(2)⋅⋅⋅Cg(1)iii 4.096(2) 16.6 −3.9255(16) −3.5198(14)
Cg(3)⋅⋅⋅Cg(2)iv 5.930(2) 72.3 1.8025(16) 3.5276(14)
Cg(3)⋅⋅⋅Cg(3)v 3.8087(18) 24.9 −3.4559(13) −3.4558(13)

Complex 4

C–H⋅⋅⋅Cg(J)g H⋅⋅⋅Cg H-perph < C–H⋅⋅⋅Cgi γ j C⋅⋅⋅Cgk

C19 –H19⋅⋅⋅Cg(2)vi 2.84 −2.83 147 5.33 3.649(7)
C29–H29B⋅⋅⋅Cg(5)vii 2.62 −2.58 143 10.64 3.442(10)
a

H2L4: Cg(1), Cg(2) and Cg(3) are the centroid of the rings, (N1–C12–C13–C14–C15–C16), (C2–C7), and (C18–C23), respectively. Complex 4: Cg(2) and Cg(5) are the centroid of the rings, (Pd1–N1–C6–C7–N2) and (C18–C23), respectively.

b

Ring number I and J (ring number mentioned over).

c

Centroid margin among ring I and ring J.

d

Angle among the centroid vector Cg(I)⋅⋅⋅Cg(J) and the normal to plane J.

e

Vertical margin of Cg(I) on ring J (Å).

f

Vertical margin of Cg(J) on ring I (Å).

g

Center of gravitation of ring J (ring number mentioned over).

h

Vertical margin of H to the ring plane J.

i

Angle among C–H and centroid Cg.

j

Angle among Cg-H vector and ring J normal.

k

Margin among C-atom and the proximate carbon atom in the benzene ring.

l

Symmetry: i = 1-x, 1-y, 1-z; ii = x, 1/2-y, −1/2+ z; iii = x, 1/2-y, 1/2 + z; iv = -x, 1-y, 1-z; v = -x, 1-y, -z; vi = 1/2-x, 3/2-y, 1-z; vii = x, 1-y, 1/2 + z.