Table 2 Selected bond lengths and angles of salt 10 ^. 2Br

C6-C7

1.513(4)

C15-C16

1.515(4)

N3-C23

1.331(3)

C7-N1

1.481(3)

C16-C21

1.392(4)

C23-N4

1.332(4)

N1-C8

1.330(4)

C21-C20

1.383(4)

N4-C30

1.465(4)

N2-C8

1.339(4)

C20-C22

1.516(4)

C30-C31

1.511(4)

C15-N2

1.478(3)

C22-N3

1.464(3)

C21-H21

0.9500

C6-C7-N1

112.0(2)

C20-C22-N3

110.7(2)

C7-N1-C8

124.5(2)

C22-N3-C23

126.1(2)

N1-C8-N2

110.0(3)

N3-C23-N4

109.9(2)

C8-N2-C15

125.0(2)

C23-N4-C30

125.6(2)

N2-C15-C16

110.3(2)

N4-C30-C31

111.9(3)