Clathrate Compound Formed by Benzene with an Ammonia–Nickel Cyanide Complex

Crystals of a new clathrate [CuII(hmtd)CuI(CN)3]·CH2Cl2 were afforded from a Me2CO-EtOH-CH2Cl2 solution of a macrocyclic complex CuII(hmtd)CuI(CN)3·2 H2O (hmtd = 5,7,7,12,14,14-hexamethyl- 1,4,8,11-tetraazacyclotetradeca- 4,11-diene). It crystallizes in the monoclinic space group P21/n, a = 7.936(5), b = 18.717(4), c = 17.783(6) Å, β = 98.55(4)°, Z = 4, R = 0.0558 for 1 870 reflections. Unprecedentedly, only one of the three nitrogen-ends of a CuI(CN)3 moiety is coordinated to the square-pyramidal Cu(II) center. The guest CH2Cl2 molecules are captured in the channel between the potlid-shaped [CuII(hmtd)CuI(CN)3] molecules.

Download Full-text

118. The structure of molecular compounds. Part V. The clathrate compound of quinol and methanol

Journal of the Chemical Society (Resumed) ◽

10.1039/jr9480000571 ◽

1948 ◽

pp. 571 ◽

Cited By ~ 30

Author(s):

D. E. Palin ◽

H. M. Powell

Keyword(s):

Clathrate Compound ◽

Molecular Compounds

Download Full-text

A Study on the Cooling Characteristics of TMA Clathrate Compound with Additives

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.326-328.1275 ◽

2006 ◽

Vol 326-328 ◽

pp. 1275-1278 ◽

Cited By ~ 1

Author(s):

Chang Oh Kim ◽

Jin Heung Kim ◽

Nak Kyu Chung

Keyword(s):

Heat Source ◽

Phase Change ◽

Specific Heat ◽

Freezing Point ◽

Phase Change Temperature ◽

Source Temperature ◽

Heat Source Temperature ◽

Clathrate Compound ◽

Supercooling Degree ◽

Change Temperature

This study aims to find out cooling characteristics of TMA 25wt%-water clathrate compound with ethanol such as supercooling, phase change temperature and specific heat. For this purpose, ethanol is added as per weight concentration and cooling experiment is performed at -6, -7 and -8, cooling heat source temperature, and it leads the following result. (1) Phase change temperature is decreased due to freezing point depression phenomenon. Especially, it is minimized as 5.1 and 5.0, 3.8 according to cooling source temperature in case that 0.5wt% of ethanol is added. (2) If 0.5wt% of ethanol is added, average supercooling degree is 0.9 and minimum supercooling is 0.8, 0.7 according to cooling heat source temperature. The restraint effect of supercooling is shown. (3) Specific heat shows tendency to decrease if ethanol is added. It is 3.013~3.048 kJ/kgK according to cooling heat source temperature if 0.5wt% of ethanol is added. Phase change temperature higher than that of water and inhibitory effect against supercooling can be confirmed through experimental study on cooling characteristics of TMA 25wt%-water clathrate compound by adding additive, ethanol.

Download Full-text