+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Methoxy-ether and crown-ether derivatives of tetrahomodioxa- and octahomotetraoxacalix[4]arenes



Methoxy-ether and crown-ether derivatives of tetrahomodioxa- and octahomotetraoxacalix[4]arenes



Acta Crystallographica. Section C, Crystal Structure Communications 57(Pt 8): 978-981



Three methoxy-ether and one methoxy-ether/crown-ether derivatives of p-tert-butyltetrahomodioxa- and p-R-octahomotetraoxacalix[4]arenes (R = methyl, tert-butyl, H) have been investigated. The first three compounds, 7,15,21,27-tetra-tert-butyl-29,30,31,32-tetramethoxy-3,11-dioxapentacyclo[23.3.1.1(5,9).1(13,17).1(19,23)]ditriaconta-1(29),5,7,9(30),13,15,-17(31),19,21,23(32),25,27-dodecaene, C(50)H(68)O(6), 33,34,35,36-tetramethoxy-7,15,23,31-tetramethyl-3,11,19,27-tetraoxapentacyclo[27.3.1.1(5,9).1(13,17).1(21,25)]hexatriaconta-1(33),5,7,9(34),13,15,17(35),21,23,25(36),29,31-dodecaene, C(40)H(48)O(8), and 7,23-di-tert-butyl-33,34,35,36-tetramethoxy-3,11,19,27-tetraoxapentacyclo[27.3.1.1(5,9).1(13,17).1(21,25)]hexatriaconta-1(33),5,7,9(34),13,15,17(35),- 21,23,25(36),29,31-dodecaene, C(44)H(56)O(8), in the partial-cone or 1,2-alternate conformations, present the common feature of methoxy-ether self-inclusion, while the fourth, 42,43-dimethoxy-7,15,23,31-tetramethyl-3,11,19,27,34,37,40-heptaoxahexacyclo[15.15.9.1(5,9).1(21,25).0(13,41).0(29,33)]tritetraconta-5(42),6,8,13(41),14,16,21(43),22,24,29(33),30,32-dodecaene, C(42)H(50)O(9), adopts the 1,3-alternate conformation owing to the presence of a 1,3-polyether chain.

(PDF emailed within 0-6 h: $19.90)

Accession: 046676826

Download citation: RISBibTeXText

PMID: 11498633

DOI: 10.1107/s010827010100823x


Related references

Application of Crown Ether in Chemical Analysis Extraction of Copper(II)-Zincon Chelate Anion with Crown Ether Complex. Analytical Letters 13(16): 1431-1439, 1980

Research in the crown ether series Communication 1. Influence of crown ether structure on complexation with potassium fluoride in organic solvents. Russian Chemical Bulletin 34(5): 905-908, 1985

Synthesis, Reactivity, and Structure of [H(13)O(6)][PtCl(5)(H(4)O(2))].2(18-cr-6): A Crown Ether Complex of a Pentachloroaquaplatinic Acid with an [H(13)O(6)](+) Cation in a Cage of Three Crown Ether Molecules. Inorganic Chemistry 36(10): 2195-2199, 1997

Laser spectroscopic study on the conformations and the hydrated structures of benzo-18-crown-6-ether and dibenzo-18-crown-6-ether in supersonic jets. Physical Chemistry Chemical Physics 9(32): 4452-4459, 2007

Effect of Crown Ether Ring Size on Binding and Fluorescence Response to Saxitoxin in Anthracylmethyl Monoaza Crown Ether Chemosensors. Canadian Journal of Chemistry 84: 1273-1279, 2006

The synthesis, coordination and electrochemical studies of metallocene bis(crown ether) receptor molecules. Single-crystal x-ray structure of a ferrocene bis(crown ether) potassium complex. Polyhedron 8(7): 879-886, 1989

Dinuclear silver(I) complexes of N,N-dibenzyl-4,13-diaza-18-crown-6-ether and dibenzo-24-crown-8-ether. Polyhedron 23(13): 2117-2123, 2004

Calix(4)arenes containing urea and crown/urea moieties: Effects of the crown ether unit and Na+ towards anion binding ability. Tetrahedron Letters 44(1): 29-32, 2003

Unusual Me-O Bond Cleavage in a Metalated Crown-Ether: X-ray Molecular Structure of (5-Methoxy-4,6-dimethyl-1,3-xylylene-2-one)-15 Crown-4 Complex of Pentamethylcyclopentadienyl Iridium. Inorganic Chemistry 38(6): 1211-1215, 2001

Application of Crown Ether to Chemical Analysis. III. Extraction of Amines with Crown Ether. Analytical Letters 13(4): 271-282, 1980

Jet-cooled electronic and vibrational spectroscopy of crown ethers: benzo-15-crown-5 ether and 4'-amino-benzo-15-crown-5 ether. Journal of Physical Chemistry. a 113(28): 8055-8066, 2009

Regioselective Synthesis of trans-1 Fullerene Bis-Adducts Directed by a Crown Ether Tether: Alkali Metal Cation Modulated Redox Properties of Fullerene-Crown Ether Conjugates. Angewandte Chemie 37(15): 2118-2121, 1998

Change of the crown ether geometry by complexation in tetrapyrrolidinyl PNP-lariat ether. Crystal structure of the complex of tetrapyrrolidinyl PNP-lariat ether with sodium iodide. Inorganica Chimica Acta 321(1-2): 185-192, 2001

The first observed complex of 9-crown-3 ether: X-ray crystallographic and solid state 13C NMR study of naphtho-9-crown-3 ether and its 2:1 LiClO4 complex. Journal of Molecular Structure 605(1): 1-8, 2002

Analytical Applications of Crown Ether Extraction of Cobalt Thiocyanate Complex With Ammonium-Crown Ether Complex. Analytical Letters 11(4): 281-286, 1978