Macrocyclic polyfunctional Lewis bases. XI. Structure of trichlorocuprates of crown-complexed sodium.

✍ Scribed by Wolfgang Dreissig; Zbigniew Dauter; Andrzej Cygan; Jan F. Biernat

• Book ID: 104139053
• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 645 KB
• Volume: 96
• Category: Article
• ISSN: 0020-1693
• DOI: 10.1016/s0020-1693(00)93732-0

✦ Synopsis

The structures of trichlorocuprates of benzo-15 crown-5 complexed sodium and dibenzo-1 g-crown-6 complexed sodium were determined from diffractometer data by direct methods and refined by leastsquares to R(F)= 0.059 and 0.039 respectively. Both complexes, (C14HZ005)2NaZCu2C16 and (CZO-H240,&NazCuzC1~, are centrosymmetric and consist of very similar Cu2C16*-units lying across the centre of symmetry. Two Na' cations, surrounded individually by crown ether ligands, are located on opposite sides of the anion. The dimeric structure of the anion is very characteristic for chlorocuprates of very bulky cations and resembles the anions present in tetraphenylphosphonium and tetraphenylarsonium chlorocuprates. This gives a further support to the 'super heavy' alkali metal cations concept.