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Thermal recording paper typically used in facsmile system has been rapidly expanding to great proportions and has secured a firm position in an information-oriented society. This would result the systematic development between electronic technology in hardware industries and coating technology in paper industries including various raw material industries.The fine powdered silica, “Mizukasil”, has played an important role in the development of the thermal recording paper as a residue-preventing agent on a thermal head. Since this fine powdered silica has extremely fine particles and is inactive, it combines the following advantages in residue-prevention, sticking prevention, color-developing sensisivity, color intensity, dot minuteness, color gradient and runnability of the thermal head.

Carbonatocobalt(III) complex of (3S,8S)-3,8-dimethyl-1,4,7,10-tetraazadecane((3S,8S)-dimetrien) was prepared from trans-[CoCl2(3S,8S)-dimetrien)]ClO4 by treating with carbonate or hydrogencarbonate ion. The carbonato complex was assigned to the Λ-cis-β configuration, a novel geometry for the (3S,8S)-dimetrien complexes. The visible absorption, circular dichroism, and proton magnetic resonance data were obtained for the Λ-β and other carbonato complexes. Preparation and assignment of dinitrocobalt(III) complex with (3S,8S)-dimetrien are given. The relative stabilities of the four isomers of (3S,8S)-dimetrien complexes (Λ-cis-α, Λ-cis-β, Δ-cis-β, and trans) are discussed qualitatively.

Carbonatocobalt(III) complex of (3S,8S)-3,8-dimethyl-1,4,7,10-tetraazadecane((3S,8S)-dimetrien) was prepared from trans-[CoCl2(3S,8S)-dimetrien)]ClO4 by treating with carbonate or hydrogencarbonate ion. The carbonato complex was assigned to the Λ-cis-β configuration, a novel geometry for the (3S,8S)-dimetrien complexes. The visible absorption, circular dichroism, and proton magnetic resonance data were obtained for the Λ-β and other carbonato complexes. Preparation and assignment of dinitrocobalt(III) complex with (3S,8S)-dimetrien are given. The relative stabilities of the four isomers of (3S,8S)-dimetrien complexes (Λ-cis-α, Λ-cis-β, Δ-cis-β, and trans) are discussed qualitatively.