Self-assembled Transition Metal Coordination Frameworks of ...

Chapter6A, 0 0 _, 0 0 _* 4, W 0 0 0
g (47%). Elemental Anal. Found (Calc.): C, 44.92 (44.77); H, 3.10 (3.16); N, 12.67
(12.53); S, 5.05 (4.78)%.
[Z~(HL2)1.(BF.).~ #140 (25)
2
To a hot solution of H2L (0.220 g, 0.5 mmol) in 10 ml chloroform was added
an equimolar amount of Zn(BF4)2~ 2H20 (0.120 g) dissolved in 10 ml hot methanol.
The yellow colored solution was then refluxed for 2 h and allowed to stand at room
temperature for slow evaporation. The yellow solid mass precipitated alter
evaporation was washed with methanol and ether and dried in vacuo over P4010.
Yield: 0.146 g (47%). Elemental Anal. Found (Calc.): C, 48.59 (48.49); H, 3.88
(3.66); N, 13.77 (13.57); S, 5.40 (5.l8)%.
[Zn(H2L3)Br;]2- 61140 (26)
A solution of ZnBr2 (0.229 g, 1 mmol) in 10 ml of methanol was added to a
solution of HZL3 (0.398 g, 1 mmol) in 50 ml boiling methanol and refluxed for 1 h and
allowed to stand at room temperature. Orange yellow powder separated out was
filtered, washed with methanol followed by ether and dried over P4010 in vacuo.
Yield: 0.411 g (62%). Elemental Anal. Found (Calc.): C, 38.10 (38.00); H, 2.83
(3.34); N, 12.69 (12.66); S, 4.92 (4.83)%.
[Zn (HL3)]4(BF4)4' ZCH, 011- 211140 (2 7)
To a hot solution of HZL3 (0.298 g, 0.75 mmol) in 50 ml methanol was added
an equimolar amount of Zn(BF4);' 21120 (0.180 g) dissolved in 10 ml hot methanol.
The orange colored solution was then stirred for 3 h and allowed to stand at room
temperature for slow evaporation. The orange powder precipitated after evaporation
was washed with methanol and ether and dried in vacuo over P4010. Yield: 0.326 g
(77%). Elemental Anal. Found (Calc.): C, 46.18 (46.06); H, 3.72 (3.24); N, 15.35
(14.99); S, 5.93 (5.72)%.
232