Y. M. Curtis's research while affiliated with Victoria University of Wellington and other places
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Publications (9)
The preparations and properties of the following complexes of dipropylenetriamine [NH2·[CH2]3·NH·[CH2]3·NH2= dpt] are reported: Ni(dpt)2Cl2,H2O, Ni(dpt)2(NO2)3,H2O, Ni dpt (NO3)2, Ni dpt (NO3)2, (H2O)2, Ni dpt Cl2, Cu(dpt)2(ClO4)2, Cu dpt (dptH)(OH)(ClO4)2, Cu3(dpt)3(CO3)(ClO4)4,2H2O, Cu4(dpt)4(CO3)Cl6,8H2O, Zn(dpt)2(ClO4)2, Zn2(dpt)2OH(ClO4)3, Zn...
The nickel(II) complex of the quadridentate heterocycle hexamethyl-1,4,8,11-tetra-azacyclotetradecadiene [formed by reaction of trisdiaminoethanenickel(II) with acetone] occurs in two non-interconvertible isomeric forms, considered due to cis and trans arrangements of the heterocycle ring components. One of these isomers occurs as two inter-convert...
Thiocyanate salts of three isomeric hexamethyltetra-azacyclotetradecadienenickel(II) cations (an interconvertible pair with trans configuration and one with cis arrangement of the double bond) are described. The infrared spectra and other physical properties indicate hydrogen bonding between the co-ordinated secondary amine groups of the complex ca...
The preparations and properties of the
compounds Cu(A)]2CN(ClO4)3, M(tet α)CNClO4, and
Ni(tet α)(CN)2 are described, where
[Cu(A)]2+ is a cyclic tetradentate Schiff
base-amine complex (hexamethyltetraazacyclotetradeoadiene-
copper(11) formed by condensation of bisethylenediaminecopper(11)
with acetone), and where [M(tet α)]2+
is the copper(11) or n...
The preparation and properties of
Ni(l,3-pn)2(NCS)2, Ni(trien)(NCS)2,
Ni(tet a)(NCS)2, Ni(tet
b)(NCS)2, Ni(dien)(NCS)2, Ni(dpt)(NCS)2, Ni(en)2NCSClO4,
and Ni(trien)NCSClO4
are described (1,3-pn = 1,3-diaminopropane, trien = triethylenetetramine, tet a and tet b are isomeric hexamethylcyclotetradecanes,
dien = diethylenetriamine, dpt = dipropylenetr...
The preparations of compounds of the types Ni(en)2(NO3)2 and [Ni(Cn)2NO3]ClO4 (en = ethylenediamine) and analogs with other diamines and with some cyclic tetramines are described. The infrared spectra of the nitrate ion for the two types of compound can be distinguished from each other, and from ionic nitrate, and are taken to indicate monodentate...
Addition of cyanide to aqueous solutions
of some copper(II) and nickel(II) tetramine complexes causes an immediate
colour change, from mauve to blue for the copper compounds and orange to pink
for the nickel compounds, these colours then slowly fading to colourless
[Cu(CN)4]3- and pale yellow [Ni(CN)4]2-
respectively as the amine complexes decompos...
Selenium treatment was given to both ewes and rams prior to mating and the effect on subsequent fertility was examined. Rams received either 0 or 5.0 and ewes 0, 2.5, 5.0 or 10.0 mg Se orally three weeks prior to joining. Ewes were blood sampled and slaughtered 30 days after their last recorded service and their reproductive tracts examined. There...
Citations
... In a very exhaustive study using over 9000 superovulated sheep, the breed factor accounted for approximately 30% of the variability in the embryo yields obtained in response to FSH treatments [4]. Early studies established that most of the differences in superovulatory response were related to the different prolificacy of the breeds used in MOET [5], with highly prolific breeds having a greater response to exogenous stimulation [6][7][8]. These differences were also found when comparing nonprolific breeds, where an interaction between the type of gonadotrophin used and the breed was also described [9]. ...
... The element is a component of glutathione peroxidase, which catalyses the removal of hydrogen peroxide (Underwood, 1977). Moreover, selenium treatment of animals in areas where it is deficient can be helpful in the prevention of mastitis and infertility (Muth, 1970; Piper et al., 1980; Suttle, 1983c; Ullrey et al., 1977). Selenium requirements (Table 3) are 0.1-0.2 ...
Reference: mineral requirements
![[object Object]](https://i1.rgstatic.net/ii/profile.image/285770452619265-1445144393982_Q64/John-Wilkins-2.jpg)
... However, the structural characterization of the mixed-valent complex, Cu 3 (NH 3 ) 3 (CN) 4 [18], demonstrated that Cu(II) cyano complexes can be isolated under appropriate conditions. Following the first report of a stable cyano-bridged Cu(II) complex [19], the first X-ray structure determination of an 'endon-end' cyano-bridged Cu(II) dinuclear complex, [Cu 2 ([14]-4,11-dieneN 4 ) 2 (CN)][ClO 4 ] 3 , ([14]-4,11-diene-N 4 = 5,7,7,12,14 -hexamethyl -1,4 -8,11 -tetraazacyclotetradeca-4,11-diene) was published in 1974 [20]. Further examples of such complexes have been reported [21] but crystal structures have been obtained for only two other cases; [Cu 2 (Me 6 tren) 2 3 [22] and [Cu 2 (terpy) 2 3 [23] (Me 6 tren= 2,2%,2%%-tris(dimethylamino)ethyl)amine and terpy= 2,2%:6%,2%-terpyridine). ...
Reference: Cyano bridged dinuclear Cu(II) complexes
![[object Object]](https://i1.rgstatic.net/ii/profile.image/272847276867592-1442063268319_Q64/Neil-Curtis-2.jpg)
... Thus, the structures of 11Pd and 11Pt may be described as [respectively [34]. The appearance of t(C@O) amide at almost the same frequencies in the ligands and/or their complexes suggested that the amide carbonyl is not taking part in coordination [35]. Generally, palladium and platinum complexes of pyridinecontaining polymers showed the appearance of sharp t(MAN) bands at 686–730 cm À1 for 12Pd–19Pd and at 674–694 cm À1 for 12Pt–19Pt which unambiguously proved that the pyridine nitrogen atom represents a second binding site in these complexes. ...
... The syntheses and structures of macrocyclic Schiff base-amine complexes of nickel(II) 53 [Colour online.] ...
... [24] Last but not the least, characteristic features of the monodentate vs. bidentate coordination modes of NO 3 À are weak intensity bands near 1750 cm À 1 , assigned to the combination modes that could be used for structural diagnosis, as suggested by Curtis and Curtis. [25] If the frequency difference (Δ) between the nitrato ν 1 + ν 4 combination modes, which commonly show up as weak doublets, falls around~30 cm À 1 , the bidentate coordination mode is assigned, while the frequency difference of about 10 cm À 1 suggests a monodentate binding. [26] For example, the IR spectrum of Dy/Ho-TMMA displays two weak resonances at 1737 cm À 1 and 1777 cm À 1 with Δ = 40 cm À 1 indicating only the Κ 2 -NO 3 coordination, while the IR spectrum of Er/Tm-TMMA shows weak bands at 1779 cm À 1 , 1740 cm À 1 , and 1732 cm À 1 with Δ = 39 cm À 1 and Δ = 8 cm À 1 confirming the presence of both Κ 1 -NO 3 and Κ 2 -NO 3 . ...
