engleski

Cage-annulated thiacrown ethers and thiacryptands

A series of cage-annulated sulfur-containing crown ethers and cryptands have been synthesized as possible specific metal host systems. The synthesis and structures of seven compounds are described, including a thiacryptand complex with Hg(II). The trishomocubane cage is essentially spherical except for a methylene group, which imparts no steric restrictions, and two disordered superimposed orientations occur in most structures. This superposition of four- and five-membered rings usually cannot be resolved into separate entities, resulting in distorted distances, angles, and thermal parameters for the cage. (3) I 4(1)cd, a = 13.207(3) Angstrom, b = 13.207(3) Angstrom, c = 35.876(12) Angstrom ; (10) C2, a = 14.551(2) Angstrom, b = 10.028(1) Angstrom, c = 10.491(1) Angstrom, beta = 107.108(2)degrees ; (14) P2(1)/n, a = 10.6277(8) Angstrom, b = 9.8488(7) Angstrom, c = 21.822(2) Angstrom, beta = 97.945(2)degrees ; (19) P2(1)/c, a = 15.381(3) Angstrom, b = 6.667(1) Angstrom, c = 18.158(3) Angstrom, beta = 94.838(4)degrees ; (25) C2/c, a = 34.386(4) Angstrom, b = 11.318(1) Angstrom, c = 13.409(2) Angstrom, beta = 110.044(2)degrees ; (28) P (1) over bar, a = 10.4487(8) Angstrom, b = 11.5677(9) Angstrom, c = 13.354(1) Angstrom, alpha = 71.042(1)degrees, beta = 87.344(1)degrees, gamma = 65.839(1)degrees ; (29) P2(1)/c ; a = 10.8138(5) Angstrom, b = 16.4949(8) Angstrom, c = 22.054(1) Angstrom, beta = 96.087(1)degrees.

Thiacrown; Thiacryptand; Homocubane macrocycle; Mercury complex

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