135491-11-1Relevant articles and documents
Molecular structures of some tertiary phosphine betaines in their crystalline adducts
Li, Song-Lin,Mak, Thomas C.W.
, p. 135 - 148 (1996)
Direct reaction of Ph3P and Ph2P(CH2)2PPh2 with acrylic acid in AcOEt-acetone yielded the tertiary phosphine betaine triphenylphosphoniopropionate, ph3P+(CH2)2CO; (L1), and the novel double betaine ethylenebis(diphenylphosphoniopropionate) - O2C(CH2)2Ph2P+(CH2)2Ph2P+(CH2)2CO2/-(L2), respectively. Reaction of Ph3 P with fumaric acid in AcOEt/acetone did not afford the corresponding betaine derivative Ph3P+CH(CO2H)CH2CO2/-, but decarboxylates to L1 in situ. Four adducts of L1, L2 and Ph3P+(CH2)3CO2/- (L3) have been prepared and characterized by single- crystal X-ray analysis. In L1·2H2O, 1, two betaine molecules are joined by donor hydrogen bonds from solvated H2O molecules to form ten-membered rings which are further linked by hydrogen bonds to form chains extending parallel to [1 0 0]. In (HL1)2·(O2CCH=CHCO2)·HO2CCH=CHCO2H·2H2O, 2, the fumaric acid molecules, fumarate anions and water molecules are interlinked by hydrogen bonds to form layers with an interlayer separation of 1/c* = 10.713(4) A; the HL1 cations are sandwiched between adjacent layers and connected to them through hydrogen bonding. In L2·(CH3)2COγ5H2O, 3, two independent L2 molecules adopt different orientations and are cross-linked by hydrogen bonds with the water molecules to form layers with an interlayer spacing of 1/a* = 10.341(1) A; the (CH3)2CO molecules are sandwiched between adjacent layers. In [(HL3)2(NO3)]NO3, 4, two independent HL3 cations are joined by one of the NO3/- group to form a dimeric cation.
