Table 1. Selected bond distances (Å) and angles (°) of complexes 8, 9, 10 and 11 in the solid state (M = Au, Ag, Cu).

	[8]+ a (Mn2B2Au)	[9]+ b (Mn2B2Ag)	[10]+ (Mn2B2Cu)	[11]+ (Mn3Cu2B2)
Mn1–B1	1.884(8)	1.851(7)	1.850(6)	1.865(4)
Mn2–B2	—	—	1.857(5)	1.865(3)
Mn1–M	2.619(1)	2.683(1)	2.447(1)	2.473(1)
Mn2–M	—	—	2.454(1)	2.445(1)
M–B1	2.181(7)	2.456(6)	2.178(5)	2.123(3)
M–B2	—	—	2.146(5)	2.128(3)
Mn1–B1–C	156.4(6)	162.7(5)	162.1(4)	160.6(2)
Mn2–B2–C	—	—	161.0(4)	159.8(2)
Mn1–B1–B2–M2	72.8(4)	67.8(8)	65.4(3)	—

^aDue to disorder of the molecule in the solid state, the bond distances and angles were taken from the less affected half of the molecule.

^bOnly half of the cation 9 is present in the asymmetric unit. The other part is generated by inversion symmetry.