Fu Chun Yu Lab Notebooks

6/7/50

The width of the two resonance lines of Co⁵⁹ in Na₃[Co(NO₂)₆] was measured by recording the derivative of the v-mode at very small H_m ~ 0.1 G. Double H_m will give double amplitude.

Measured width = 0.72 G

Amp Ratio of the two line = 16 (low freq / high freq)

[Break]

Width of SbCl₆^- = 0.96 G [Width of] SbCl₅ = 8.68 G

at H₀ = 6673 G

Mo^(I) (3130 --> 3120 KC)

in NaNo₃ = 1.04274 1.40274 ± 0.000057

in NH₃ {{tex: $\frac{\gamma(N^{15})}{\gamma(N^{14})}$ :tex}}= 1.04261 1.40261 ± 0.00006 ± 0.00008

Atomic wt of nitrogen in 31.4% enriched N¹⁵ = 14.00751 × 0.686 + 15.00489 × 0.314 = 14.321

Gauss of HNO₃ solⁿ = 12.9 containing 10.57% nitric acid by wt.

Gauss of HNO₃ = 0.1057 × 12.9 = 1.3635

Moles of HNO₃ = 1.3635/63.329 = 0.02153

Molecular wt of NaNO₃ = 85.32

Wt. of NaNo₃ = 85.32 × 0.02153 = 18.34 1.834 grams

Solⁿ of NaNO₃ = 3.5 c.c.

Molar of solⁿ =

March 31, 50

By replacing Co in K₃[Co(C₂O₄)₃] with Al & comparing the Al-resonances from K₃[Al(C₂O₄)₃] & Al₂(SO₄)₃, no appreciable shift can be found.

April 3, 1950

No structure of Sb¹²¹-resonance can be found from a freshly prepared aqueous solⁿ of HSbCl₆.

HSbCl₆ was prepared by treating chemically pure SbCl₅ with 10% (~3 N) hydrochloric acid, both of the reagents were precooled to the temp of ice water. [left margin]a fuming liquid[/margin]

HSbCl₆ is unstable at room temperatures Signal amplitude was reduced to about 20% after standing for 24 hours.

Suggestion: mean life time of the compound can be measured with the spectrometer.

Q (In¹¹³) = 1.144 × 10^-24 cm²

Q (In¹¹⁵) = 1.161 × 10^-24 cm²

Feb. 13, '50

N¹⁴ occurs at 3.34 MC at H₀ = 10600 G in K₃Co(CN)₆. Search for N¹⁴ in Na₃Co(NO₂)₆ in freq range 3.445 MC - 3.26 MC is negative

As to the structure of NaSbF₆ refer to Nils Schrewelius, Röntgenuntersuchung der Verbindungen NaSb(OH)₆, NaSbF₆, NaSbO₃ und gleichartiger Stoffe. Zeitschrift für anorganische und allgemeine Chemie Bd 238, 248 (1938)

NaSbF₆ is cubic a = 8.18 Å The structure is probably the space group 4 Na in 4(b) , 4 Sb in 4(a), 24 F in 24(d) ; x = -0.05, y = -0.05 , z = 0.225

within the SbF₆^- octahedron 2.67, 2.78 and from octahedron [?] octahedron 2.72 Å

The function at its poles inside the unit circle around the origin.

The zeros of are the zeros of the two equations

If the zeros of (1) are z₁ & z₂, the zeros of (2) are the complex conjugates . If z₁ lies inside the unit circle, so does . Therefore z₁ & are the only two [principle?] poles inside the circle. Thus

The residue of f(z) at

The residue of f(z) at