The crystal and molecular structure of 18-Crown-6 HgC12 and 18-Crown-6 Cdc12

Hg(18-Crown-6)C12 and Cd(18-Crown-6)C12 are isostructura1, space group Cl~ Z = 2. For the mercury compound, a = 10.444(2) A° , b = 11. 468(1) A° , c = 7.754(1) A° , a = 90.06(1)°, B = 82.20(1)°, Y = 90.07(1)°, Dobs = 1.87, Dca1c = 1.93, V = 920.05 13, R = 4.66%. For the cadmium compound, 000 a = 10.374(1) A, b = 11.419(2) A, c = 7.729(1) A, a = 89.95(1)°, B = 81.86(2)°, Y = 89.99(1)°, Dobs = 1.61, Dcalc = 1.64, V = 906.4613, R = 3.95%. The mercury and cadmium ions exhibit hexagonal bipyramidal coordination, with the metal ion located on a centre of symmetry in the plane of the oxygen atoms. The main differences between the two structures are an increase in the metal-oxygen distance and a reduction in the metalchloride distance when the central ion changes from Cd2+ to Hg2+. These differences may be explained in terms of the differences in hardness or softness of the metal ions and the donor atoms.

In search of the Holy Grail : how viable is John Rawls' purely political conception of justice?

Please consult the paper edition of this thesis to read. It is available on the 5th Floor of the Library at Call Number: Z 9999 P65 Y68 1995

Letter to S.D. Woodruff from Thomas H. Johnson of the Department of Crown Lands

Letter to S.D. Woodruff from Thomas H. Johnson of the Department of Crown Lands replying to Mr. Woodruff’s inquiry about the boundaries of berth 192, Dec. 8, 1877.

Certificate from the Accounts Branch of Crown Lands, Ontario

Certificate from the Accounts Branch of Crown Lands, Ontario in receipt of $72 for renewal of license made out to S.D. Woodruff and signed by Thomas H. Johnson, Assistant Commissioner, May 23, 1881.

Notice from the Crown Lands Department of Ottawa that the lands on Long Point, Lake Erie would be offered at public auction on May 4, 1866

Notice from the Crown Lands Department of Ottawa that the lands on Long Point, Lake Erie would be offered at public auction on May 4, 1866. This is attached to a small newspaper clipping with the same information, dated April 20, 1866.

Explanation of the Land Surrendered to the Crown by the Six Nations Indians for Mr. Dickson

Explanation of the Land Surrendered to the Crown by the Six Nations Indians for Mr. Dickson: 1 handwritten page explaining the Six Nations surrender of land to the Crown in order to allow the Crown to transfer the land to Mr. Dickson to compensate him for legal fees. [This is not an older document. It was possibly written by the Niagara Historical Society], n.d.