Syntheses, crystal structures, and polymorphism of quaternary pyrrolidinium chlorides

被引：15

作者：

Laus, Gerhard ^{[1
]}

Bentivoglio, Gino ^{[2
]}

Kahlenberg, Volker ^{[3
]}

Griesser, Ulrich J. ^{[1
]}

Schottenberger, Herwig ^{[1
]}

Nauer, Gerhard ^{[4
]}

机构：

[1] Univ Innsbruck, Fac Chem & Pharm, A-6020 Innsbruck, Austria

[2] Competence Ctr Appl Electrochem, A-2700 Wiener Neustadt, Austria

[3] Univ Innsbruck, Inst Mineral & Petrog, A-6020 Innsbruck, Austria

[4] Univ Vienna, Inst Phys Chem, A-1090 Vienna, Austria

来源：

CRYSTENGCOMM | 2008年 / 10卷 / 06期

关键词：

D O I：

10.1039/b718917f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The syntheses, properties, and X-ray crystal structures of 1-methyl-1-propylpyrrolidinium chloride 1, 1-allyl-1-methylpyrrolidinium chloride 2, and 1-methyl-1-propargylpyrrolidinium chloride 3 are described. Colorless plates of 1 (C8H18ClN) crystallize in the orthorhombic space group Pnab with Z = 8 and unit cell parameters a = 10.0354(11) angstrom, b = 13.254(2) angstrom, c = 14.6231(16) angstrom. Colorless prisms of 2 (C8H16ClN) crystallize in the monoclinic space group P2(1)/c with Z = 4 and unit cell parameters a = 6.4857(10) angstrom, b = 12.005(3) angstrom, c = 12.526(2) angstrom, and beta = 102.746(13)degrees. Colorless needles of 3 (C8H14ClN) crystallize in the monoclinic space group P2(1)/n with Z = 4 and unit cell parameters a = 8.4849(14) angstrom, b = 8.1271(16) angstrom, c = 13.501(2) angstrom, and beta = 100.408(13)degrees. The five-membered ring adopts a twisted conformation in 1 but an N-envelope in 2 and 3. The salts form networks of weak C-H center dot center dot center dot Cl(-)hydrogen bonds. Hot stage microscopy, differential scanning calorimetry and temperature-controlled X-ray powder diffractometry revealed that each of the three compounds exists in at least two different crystal forms.

引用

页码：748 / 752

页数：5

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