Long chain secondary dithiooxamides as ligands for the synthesis of platinum(II) metallomesogens

被引:6
作者
Aversa, MC
Bonaccorsi, P
Bruce, DW
Caruso, F
Giannetto, P
Lanza, S
Morrone, S
机构
[1] UNIV MESSINA,DIPARTIMENTO CHIM ORGAN & BIOL,I-98166 MESSINA,ITALY
[2] UNIV EXETER,DEPT CHEM,EXETER EX4 4QD,DEVON,ENGLAND
[3] UNIV MESSINA,IST CHIM COMPOSTI ETEROCICLICI,I-98166 MESSINA,ITALY
关键词
platinum complexes; dithiooxamide ligands; metallomesogens; H-1 and C-13 NMR;
D O I
10.1016/S0020-1693(96)05450-3
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
In the search for platinum complexes of secondary dithiooxamides (RNHCS)(2) (termed as R2H2DTO), showing metallomesogens properties, several [Pt(R2HDTO)(2)] were synthesised starting from cis-[Pt(Me2SO)(2)Cl-2]. The paper is mainly devoted to the co-ordination chemistry of long chain dithiooxamides which in some cases show a different behaviour with respect to R2H2DTO bearing small substituents on nitrogen atoms. The observed reactivity appears related only in part to the lower basicity of amide nitrogen atoms in diaryl- with respect to dialkyl-dithiooxamides, and differently populated conformations of the complexes seem to play an important role. Mesophase formation far [Pt(R2HDTO)(2)] with R=3,4-[CH3(CH2)(9)O](2)C6H3 and 3,4-[CH3(CH2)(11)O](2)C6H3 is suggested by polarising optical microscopy and differential scanning calorimetry. The synthesis of analogous bis-chelates, but with two different dithiooxamide ligands, is also described.
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页码:235 / 241
页数:7
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