Rundle

FIGURE 1. Structures for Me2SCT(I) and MeSO" Me(II). The assignment of 0.5 spin density to each of the two axial ligands in I is only applicable to equivalent ligands in the Rundle formulation. Qualitatively, more spin density is expected to reside on the axial methyl than on the O group. Reproduced by permission of the authors from Reference 8. 

Rundle and co-worker performed x-ray diffraction studies on solid phenylmag-nesium bromide dietherate and on ethylmagnesium bromide dietherate, which they obtained by cooling ordinary ethereal Grignard solutions until the solids crystallized. They found that the structures were monomeric ... 

Malmqvist B, Rundle S (2002) Threats to the running water ecosystems of the world. Environ Conserv 29 134—153... 

A priori borataethenes would be expected to be much more stable than the corresponding boraethenes because, as Rundle presciently noted about organometallic structures,50 all low-lying atomic orbitals are involved in the bonding. In fact, the stabilization of 52 is the driving force for the acidity of C—H bonds of proper orientation a to tricoordinate boron. Such acidity was first detected by Rathke and Kow through the treatment of B-methyl-9-borabicyclo[3.3.1] nonane (53) with hindered lithium amides, such as lithium 2,2,6,6-tetramethylpiperidide51 (Eq. 18) ... 

The suggestion of a helical host molecule was originally put forward by Hanes 136) and then developed by Freudenberg and his colleagues 137). Chemical 138 140) and X-ray diffraction studies by Rundle et al.141 143) and by Bear 144,145) demonstrated that these ideas were correct, and revealed that the helical structure had an outer diameter of 13.0 A, an inner diameter of 5 A, and a pitch of 8.0 A with six glucose units per turn. The iodine atoms were arranged in a linear fashion with an average I-I separation of approximately 3.1 A. These early results have been reviewed 146, 147). They represent the first confirmed example of helical structure for a biopolymer. 

C. Rundle, A Beginner s Guide to Ion-Selective Electrode Measurements, http //www.nico2000.net/ Book/Guidel.html. (2005). 

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