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Daniels, Glen Cunkle, and Ferdinand Salvajion for their experimental contributions and Professors Leon Stock, Peter Beak, and Victor Snieckus for stimulating discussions. G.C. thanks Zambon Chimica s.p.a. for a leave of absence.

The crystal structure of m‐iodobenzoic acid is reported. The crystals are monoclinic, P21/c, with a = 6.220(3) Å, b = 4.689(2) Å, c = 26.67(1) Å, β = 101.80(3)°, Z = 4, C7H5IO2. The structure has been determined by direct methods and refined to R 0.026 for 1288 reflections recorded with an automatic single crystal diffractometer. The structure is composed of essentially planar hydrogen‐bonded dimer units with significant intermolecular iodine‐iodine contacts. The configuration of the dimer unit is transoid. Since this is the penultimate member of the family of mono‐halogen‐substituted benzoic acids its structure is compared with those previously reported. In particular, the effects of differences in molecular geometry of the o‐, m‐, and p‐isomers and the strengths of the intermolecular halogen‐halogen interactions are surveyed. The geometry of the carboxyl group of m‐iodobenzoic acid in the solid state and the carbonyl absorption in the Ftir spectrum of the crystalline acid at room temperature suggest the presence of dynamic proton isomerism as has been recently found by other investigators in crystalline benzoic acid and some of its derivatives.

Nanorobotics is the technology of creating machines or robots at or close to the scale of a nanometre (10-9 metres), machines Constructed at the molecular level (nanomachines) may be used to cure the human body of its various ills.Traditionally nanotechnology dealt with design, synthesis and Application of materials along with devices at the nanometer scale. The application of nanotechnology in the field of health care and drug Delivery has come under great attention in recent times.Nanomaterials have a large surface area to Volume ratio and their physicochemical properties, such as Friction and interaction with other molecules, are distinct From equivalent materials at a larger scale. The most com-Mon use of nanotechnology in medicine has been in the Areas of developing novel therapeutic and imaging modal-Ities that have the potential to outperform the current state of The art in these areas. We will focus on the application of Nanotechnology to the development of smart drug deliv-Ery vehicles for cancer therapeutic applications. The most Common examples of these nanoscale delivery vehicles include polymeric nan Particles, dendrimers, nanoshells, liposomes, nucleic acid-Based nanoparticles, magnetic nanoparticles, and virus Nanoparticles. The following four types of nanorobotic systems have been developed and studied so far (a) large size nanomanipulators with nanoscale manipulation capability; (b) proicin- and DNA- hused bionanorobotic systems;c) Magnetically guided nano robotic system and d) bacterial based Nanorobotic etc.It can be used in many other applications.

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