The structure is molecular, and the uranium atom has pentagonal bipyramidal coordination, the pentagonal ring being made up of four oxygen atoms from two bidentate (HFA) units and the nitrogen atom of the ammoni
By omitting the water, nitrogen and neopentane values, we arrive at the value vp = (0.31 ± 0.02) cm3 g− 1, which is in agreement with a calculated supercage volume of 0.30 cm3 g− 1. This supports Breck's (1974, p. 428) conclusion that, with the possible exception of water,...
installationofpentanestorage tanks, replacement of the foaming machine metering units; replacement of circulating saw cutter by belt cutter; nitrogen supply system; mixing head suitableforpentane;dynamic mixer for components suitabletopentane;modification ...
The complete assembly was kept inside a large metal block with heating wires wound around it and was insulated with polyurethane foam. The insulated metal block was kept in liquid nitrogen contained in a metal dewar. The temperature was controlled and measured with copper-constantan thermocouples. ...
The nitro oxygen atoms form close contacts with the nitrogen atoms of the N→O groups and the system of the tetrazine ring, as well as with the carbon atoms of bicyclic compound 1 . The reversible crystallization—melting processes of complex 1 · 2 and the eutectic E 2 were studied by ...
As a means of introducing two nitrogen donors and one phosphorus donor into a tripod ligand, substitution of the Br and OMs functions in O(CH2)2C(CH2Br)(CH2OMs), 8, by nitrogen nucleophiles and subsequent cleavage of the oxetane ring by a phosphide nucleophile to give HOCH2C(CH2PPh...
Addition of the amine may require previous ring enlargement to give the dehydroazepine 12; there is no indication that this is an intermediate of any stability, however, and if formed, this is in equilibrium with (1)4. Triplet nitrene (3)4 is characterized in matrix by UV spectroscopy, ...
or R2 and R3, together with the nitrogen atom to which they are linked, form a 5-, 6- or 7-membered ring, optionally substituted,… and R4 represents a hydrogen atom, an alkyl radical or an arylalkyl radical, optionally substituted, or a radical … … to a process and intermediates ...
represents the group obtained by removing aMINO GROUP OF 2-mETHYL-1,5-pentanediamine, R {SUB, SUB 1} YR {2} may be the same or different and represent hydrocarbon radicals optionally substituted, OR {SUB, SUB 1} YR {2} form together with the nitrogen atom} {BE -carbon RING cycloalipha...
11a). The angles between the pyridine rings in each 3,2′:6′,3″-tpy domain are similar (31.1 and 32.0° for the unit with N1, N2, N3 compared to 20.4 and 31.9° for that with N4, N5, N6); the angles between the pyridine ring with N2 or N5 and the central arene ring of 2...