Colloidal and polymeric nature of fossil amber

1999 ◽  
Vol 30 (8) ◽  
pp. 971-983 ◽  
Author(s):  
Douglas Gold ◽  
Benjamin Hazen ◽  
Wilmer G. Miller
Keyword(s):  
Polymeric Nature

Direct Evidence for the Polymeric Nature of Polydopamine

2018 ◽  
Vol 131 (4) ◽  
pp. 1089-1094 ◽  
Author(s):  
Peyman Delparastan ◽  
Katerina G. Malollari ◽  
Haeshin Lee ◽  
Phillip B. Messersmith
Keyword(s):  
Direct Evidence ◽  
Polymeric Nature

Structure and polymeric nature of zinc(II) and cobalt(II) phosphino-thionates

1970 ◽  
pp. 3386 ◽  
Author(s):  
M. Calligaris ◽  
A. Ciana ◽  
S. Meriani ◽  
G. Nardin ◽  
L. Randaccio ◽  
...  
Keyword(s):  
Polymeric Nature

scholarly journals Diaqua(nitrato-κ2O,O′)bis(L-valine-κO)lead(II) nitrate at 296 K

IUCrData ◽  
2016 ◽  
Vol 1 (4) ◽  
Author(s):  
Sylvain Bernès ◽  
Laura Gasque
Keyword(s):  
Low Temperature ◽  
Bond Length ◽  
Coordination Number ◽  
Coordination Sphere ◽  
Title Complex ◽  
The Other ◽  
Methyl Group ◽  
Space Group ◽  
Polymeric Nature ◽  
Other Hand

The structure of the title complex, [Pb(NO3)(C5H11NO2)2(H2O)2]NO3, had been determined previously at 173 and 193 K, and is now reported at 296 K, in the same space group. The main difference with the low-temperature structures is that a methyl group of one valine ligand is clearly disordered over two positions, for which the occupancies converged to 0.56 (3) and 0.44 (3). Bond-length variations within the coordination sphere of PbIIas a function ofTare difficult to assess because uncertainties on these parameters are high. On the other hand, Pb...O distances above 2.9 Å cannot be assigned unambiguously to formal Pb—O bonds. As a consequence, the polymeric nature of the complex previously described at 173 K is uncertain, as well as the actual coordination number of PbII, and it is thus not possible to determine if the metal environment is holo- or hemidirected.

Mössbauer Studies on some Europium(III) β-Diketonate Complexes

1979 ◽  
Vol 34 (5) ◽  
pp. 625-630 ◽  
Author(s):  
O. K. Medhi ◽  
U. Agarwala
Keyword(s):  
Liquid Nitrogen ◽  
Bond Formation ◽  
Liquid Nitrogen Temperature ◽  
Mössbauer Studies ◽  
Resonance Effects ◽  
Polymeric Nature ◽  
Symmetric Structures

Abstract Some Europium(III) dibenzoylmethide and benzoylacetonate complexes have been subjected to Mössbauer studies at liquid nitrogen temperature. An attempt is made to discuss covalency in these complexes in terms of 6s, 4f and/or 5d orbital participation in the bond formation. Small linewidths are correlated to less symmetric structures. Resonance effects reflect the polymeric nature of these chelates.

Polymeric nature of the inhibiting action of polyarylene methylenes

1982 ◽  
Vol 24 (4) ◽  
pp. 952-963 ◽  
Author(s):  
A.Ye Chuchin ◽  
O.T Ivanilova
Keyword(s):  
Inhibiting Action ◽  
Polymeric Nature

Crystalline cobalt, zinc, manganese, and iron alkoxides of glycerol

1970 ◽  
Vol 23 (10) ◽  
pp. 1963 ◽  
Author(s):  
EW Radoslovich ◽  
MR Raupach ◽  
PG Slade ◽  
RM Taylor
Keyword(s):  
Powder Diffraction ◽  
Iron Complexes ◽  
X Rays ◽  
X Ray ◽  
Polymeric Nature ◽  
Crystalline Metal

A series of crystalline metal glycerolato complexes has been prepared. The preparation of the cobalt, zinc, manganese, and iron complexes [(1 )-(4)] was achieved by heating (above 110�) glycerol with metal acetates, carbonates, oxalates, oxides, or hydroxides. The structure of (1) has been determined by X-rays and contains Co-O-Co-O and Co-O-C-C-O rings. X-ray powder diffraction and i.r. data are given for (1)-(4). These show (1) and (2) to be isostructural and that (3) and (4) are variants of these. The insolubility of (I), (2), (3), and (4) is in accord with their polymeric nature.

The Polymeric Nature of a Supposed Simple Mercury Ring Compound

1955 ◽  
Vol 77 (22) ◽  
pp. 6080-6080 ◽  
Author(s):  
R. K. Summerbell ◽  
James R. Stephens
Keyword(s):  
Polymeric Nature
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