Isomerism in coordination complexes and polymers derived from bispyridylurea ligands: Effect of solvents, conformational flexibility, and positional isomerism of the ligands

被引:65
作者
Kumar, D. Krishna [1 ]
Das, Amitava [1 ]
Dastidar, Parthasarathi [1 ]
机构
[1] CSIR, Cent Salt & Marine Chem Res Inst, Analyt Sci Discipline, Bhavnagar 364002, Gujarat, India
关键词
D O I
10.1021/cg070301l
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Reactions between Cd(NO3)(2)center dot 6H(2)O and N,N'-bis(3-pyridyl)urea (3bpu)/N,N'-bis(4-pyr-idyl)urea (4bpu) with a 1:2 metal:ligand ratio under various solvent systems (polar/nonpolar) afforded four discrete coordination complexes, namely, [{(H2O)(2)-Cd(3bpu)(4)}-(NO3)(2)-2H(2)O center dot X] 1, [{(H2O)(2)Cd(3bpu)(4)}-(NO3)(2)] 3, [{(H2O)(2)Cd(3bpu)(4)}center dot(NO3)(2 center dot)2H(2)O center dot p-xylene] 4, [{(H2O)(2) (NO3)(2)Cd(mu-4bpu)(2)}] 8, and four coordination polymers, namely, [{(H2O)(3)(NO3)Cd(mu-3bpu)}center dot(NO3)center dot H2O-1/2o-xylene](n) 2, [{(H2O)(3)(NO3)Cd(mu-3bpu)}center dot(NO3)-X](n) 5, [{(NO3)(2)Cd(mu-3bpu)(2)}](n) 6, [{(H2O)(NO3)Cd(mu-4bpu)(2)}center dot(NO3)-EtOH center dot nitrobenzene](n) 7, which were mainly characterized by single-crystal X-ray diffractometry. The effect of solvents, conformational flexibility, and positional isomerism of the ligands on the various isomerisms (supramolecular isomerism and polymorphism) is discussed.
引用
收藏
页码:2096 / 2105
页数:10
相关论文
共 55 条
[1]   Supramolecular isomerism in coordination compounds: Nanoscale molecular hexagons and chains [J].
Abourahma, H ;
Moulton, B ;
Kravtsov, V ;
Zaworotko, MJ .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (34) :9990-9991
[2]   Structural diversity in two-dimensional coordination polymers constructed from simple building-blocks; a rare example of coordination polymer polymorphs structurally characterised from multiple crystals [J].
Barnett, SA ;
Blake, AJ ;
Champness, NR ;
Wilson, C .
DALTON TRANSACTIONS, 2005, (24) :3852-3861
[3]   Structural diversity of building-blocks in coordination framework synthesis -: combining M(NO3)2 junctions and bipyridyl ligands [J].
Barnett, SA ;
Champness, NR .
COORDINATION CHEMISTRY REVIEWS, 2003, 246 (1-2) :145-168
[4]   Structural isomerism in CuSCN coordination polymers [J].
Barnett, SA ;
Blake, AJ ;
Champness, NR ;
Wilson, C .
CHEMICAL COMMUNICATIONS, 2002, (15) :1640-1641
[5]   ...And another comment on Pseudopolymorphism [J].
Bernstein, J .
CRYSTAL GROWTH & DESIGN, 2005, 5 (05) :1661-1662
[6]  
Biradha K, 2002, ANGEW CHEM INT EDIT, V41, P3395, DOI 10.1002/1521-3773(20020916)41:18<3395::AID-ANIE3395>3.0.CO
[7]  
2-D
[8]  
Blake AJ, 2000, ANGEW CHEM INT EDIT, V39, P2317, DOI 10.1002/1521-3773(20000703)39:13<2317::AID-ANIE2317>3.0.CO
[9]  
2-B
[10]   Topological isomerism in coordination polymers [J].
Blake, AJ ;
Brooks, NR ;
Champness, NR ;
Crew, M ;
Deveson, A ;
Fenske, D ;
Gregory, DH ;
Hanton, LR ;
Hubberstey, P ;
Schröder, M .
CHEMICAL COMMUNICATIONS, 2001, (16) :1432-1433