Complex

Anal. % (Calc.)

Molar mass

C

H

N

Cu

X

Ma

[(Pip)₄Cu₄Cl₄(CO₃)₂]

29.8

(30.8)

5.3

(5.1)

6.2

(6.4)

29.2

(29.7)

17.4

(16.6)

890 ± 20

(856)

[(Pip)₄Cu₄Br₄(CO₃)₂]

24.2

(25.5)

4.4

(4.3)

5.4

(5.4)

24.9

(24.6)

30.3

(30.9)

1128 ± 20

(1033)

[(Pip)₈Cu₄Cl₄(CO₃)₂]

39.0

(42.1)

6.6

(7.3)

9.2

(9.4)

21.1

(21.2)

12.2

(11.9)

1190 ± 20

(1197)

[(Pip)₈Cu₄Br₄(CO₃)₂]

34.0

(36.7)

6.1

(6.4)

7.8

(8.2)

18.4

(18.5)

23.0

(23.3)

1390 ± 20

(1375)