Macrocycles with a single pendant arm: synthesis of N-R-(1,4,7-triazacyclononane) [L, R = 4-but-1-ene; L′, R = 3-prop-1-ene]: Synthesis of the CuI complex [CuL]I and synthesis and crystal structure of the CII complex [CuL2][BPh4]2 and the μ-hydroxy bridged CII dimer [LCu(μ-OH)2CuL] [BPh4]2

Silica-bound copper(ii)triazacyclononane as a phosphate esterase: effect of linker length and surface hydrophobicity

“…The four carbon linker was chosen because N-(4-but-1-ene) (1,4,7triazacyclononane) is a known compound. 37 The eight carbon linker was used because it is sufficiently longer than the four carbon linker, the starting materials to prepare N-(8-oct-1-ene) (1,4,7triazacyclononane) are commercially available, and N-(8-oct-1ene)(1,4,7-triazacyclononane) may be prepared in a similar fashion to the four carbon analog. The terminal olefins of these alkenylmodified triazacyclononanes were coupled with hydride groups on hydride-modified silica, 38 forming a stable silicon-carbon bond.…”

“…The following reagents were synthesized as previously reported: N,N¢,N¢¢-tri(p-toluenesulfonyl)diethylenetriamine, 49 1,2-di(ptoluenesulfonyloxy)ethane, 49 1,4,7-tri(p-toluenesulfonyl)-1,4,7triazacyclononane, 49 1,4,7-triazacyclononane trihydrochloride, 50 1,4,7-triazacyclononane, 51, 52 1,4,7-triazacyclo[5.2.1.0 4. 10 ]decane ("capped tacn"), 53 N-(4-but-1-ene)-1,4,7-triazacyclononane, 37 and hydride-modified silica gel. 38 Instrumentation 1 H and 13 C nuclear magnetic resonance spectra were recorded on either Bruker WM-300 or Varian 500 NMR spectrometers.…”

Silica-bound copper(ii) triazacyclononane: a robust material for the heterogeneous hydrolysis of a phosphodiester

“…Silica-bound (Cu [9]aneN 3 ) 2+ was prepared by a rhodiumcatalyzed hydrosilation reaction between N-(4-but-1-enyl)-1,4,7-triazacyclononane 4 and hydride-modified silica, 5 both of which were prepared according to literature procedures. The chosen method of immobilization was favored because it produced more uniform and hydrolytically stable silicon-alkyl group linkages.…”

A centrosymmetric hydroxo-bridged pentamethyldiethylenetriamine copper(II) complex, {[(pmdeta)Cu(OH)]2}2+·2Br−·2MeCN

“…This related complex also shows a distorted square pyramidal coordination sphere around the Cu atoms and two hydroxo bridges with CuÐO distances [1.964 (4) and 1.893 (5) A Ê ] similar to those in the present structure [1.904 (2) and 1.988 (2) A Ê ]. This bonding situation seems to be common in this type of Cu II complex and was also observed in the hydroxo-bridged cyclic triamine Cu II compounds N,N H ,N HHtrimethyl-1,4,7-triazacyclononane [CuÐO 1.936 (4) and 1.939 (4) A Ê ; Chaudhuri et al, 1985], N-4-but-1-ene-1,4,7-triazacyclononane [CuÐO 1.929 (2) A Ê ; Farrugia et al, 1996] and other triazacyclononane complexes with different substitution patterns (Mahapatra et al, 1996). A special feature of the title compound is its distortion of the square-pyramidal coordination sphere.…”