Correlation between structure- and temperature-dependent magnetic behavior of iron dithiocarbamate complexes. Crystal structure of tris(N,N diethyldithiocarbamato)iron(III) at 297.deg. and 79.deg.K

Compounds with intermediate spin. 3. Structure of tris[N,N-bis(2-hydroxyethyl)dithiocarbamato]iron(III) at 150 and 295 K

“…1.23 ( and angles within the S2CNC 2 groups of the three ligands are the same within experimental error and agree with corresponding distances and angles in other dithiocarbamatoiron(III) compounds (Albertsson & Oskarsson, 1977;Leipoldt & Coppens, 1973). Table 6 gives the deviations from least-squares planes through _ /S\.-../C the S2CN groups.…”

“…It is an extension of Fig. 2 in Leipoldt & Coppens (1973). They reported a curvilinear relationship between #eft and d but the additional points indicate that Pelf is also a function of other variables besides d, e.g.…”

“…The main structural difference at the two temperatures is a decrease of the average Fe-S distance from 2.390 (3)/k at 295 K to 2.331 (3)/k at 150 K. This is accompanied by a decrease in the magnetic moment from Pelf = 4.20 to #elf = 2.40. they all comprise mononuclear tris complexes with or without solvate molecules in the structure. All crystal structure determinations except two (Albertsson & Oskarsson, 1977;Leipoldt & Coppens, 1973) were made at room temperature. The present series of investigations aims at correlating the temperaturedependent magnetic behaviour of some solid dithiocarbamates with their geometrical features (Albertsson & Oskarsson, 1977).…”

“…fleft as a function of mean observed Fe-S distances, d, for some structures with FeS 6 cores. Points (I)- (7) are from Leipoldt & Coppens (1973) and references therein; (8) this paper; (9) Albertsson & Oskarsson (1977); (10) Mitra, White & Raston (1976); (11) Healy & Sinn (1975); (12) Butcher & Sinn (1976); (13) Sinn (1976).…”

A cryostat for collection of three-dimensional diffractometer data at liquid helium temperatures

“…Perhaps the main drawbacks of the equipment are its price (about $13000 at present), and the fact that its use is still not as straightforward as the collection of room-temperature diffractometer data. Nevertheless, several data sets, totalling more than 25000 reflections have been collected with the use of this equipment and the results (Ross & Coppens, 1972: Leipoldt & Coppens, 1973Rees & Coppens, 1972 generally support the desirability of low-temperature data collection in the study of molecular geometries and molecular electron density. …”