Preparation and Some Properties of HAu(CN)₂¹

Synthesis and applications of [Au(NCPh)2]+, a versatile labile gold(I) intermediate

“…In [Au(NCPh) 2 ] + the weakly bound benzonitrile ligands may be displaced with 2 equivalents of the cyanide anions from potassium cyanide and K[Au(CN) 2 ] is obtained in virtually quantitative yields. The infrared spectrum of the complex shows a sharp band at 2142 cm Ϫ1 (lit., 23 2141 cm Ϫ1 ) which can be assigned to the antisymmetric ν(C᎐ ᎐ ᎐ N) stretching mode. An initial pale yellow precipitate is observed when potassium cyanide is added to the gold() solution; this presumably results from The conventional route to anionic halide complexes is quite tedious, and involves the initial formation of gold() compounds followed by their reduction.…”

Trypsin Monolayers at the Air–Water Interface. III. Structural Postulates on Inactivation

“…4•11 Yet treatment with agents that specifically alter secondary structure, such as urea or guanidine, produces reversible denaturation which becomes irreversible upon prolonged standing or further exposure to higher temperatures. 10 One of us12 has advanced an hypothesis, summarized below, to explain some of the heat denaturation data of Stearn and others. The individual processes in this scheme are not new13; rather, the specified sequence of steps leading to inactivation is novel.…”

“…Trypsin films at a surface concentration of 10 7/ 100 cm.2 exhibit a film pressure of about 0.25 dyne/ cm. (film age of 5 minutes).…”

“…As part of a general investigation of complex metal cyanides, which is being conducted in this Laboratory (see ref. [4][5][6][7][8][9][10][11][12][13][14][15][16]), the complete crystal…”