Novel Synthetic Routes to s-Block Metal 2,5-Diphenylphospholides and Crystal Structures of the Bis(tetrahydrofuran) Complexes of the Potassium, Calcium, and Strontium Derivatives

作者：Wimmer Katja; Birg Christin; Kretschmer Robert; Al Shboul Tareq M A; Goerls Helmar; Krieck Sven; Westerhausen Matthias^*

来源：Zeitschrift fur Naturforschung Section B-A Journal of Chemical Sciences, 2009, 64(11-12): 1360-1368.

DOI：10.1515/znb-2009-11-1216

• Calcium
• Potassium
• Strontium
• Phospholide
• Sandwich Complexes
• Salt Metathesis Reactions

The reduction of 1,4-diphenyl-1,4-bis(diphenylphosphanyl)buta-1,3-diene (1) (1,4-diphenyl-NUPHOS) with potassium in THF yields bis(THF)potassium 2,5-diphenylphospholide (2) which crystallizes with a chain structure. The metathesis reaction of 2 with the iodides of calcium, strontium, and barium leads to the formation of [bis(THF)calcium bis(2,5-diphenylphospholide)] (3), [bis(THF)strontium bis(2,5-diphenylphospholide)] (4), and [bis(THF)barium bis(2,5-diphenylphospholide)] (5). The reaction of M{P(H)SiiPr(3)}(2) with diphenylbutadiyne in THF also leads to the formation of the 2,5-diphenylphospholides of calcium (3), strontium (4), and barium (5). The molecular structures of 2 to 4 are discussed. The environment of the metal atoms is very similar in all these compounds: The metal atoms show an eta(5) coordination to the phospholide rings forming a bent sandwich complex. The open coordination site is occupied by two THF molecules.

• 出版日期2009-12