Structure and thermal decomposition of methylamine borane

被引：56

作者：

Bowden, Mark E. ^{[1
]}

Brown, Ian W. M. ^{[1
]}

Gainsford, Graeme J. ^{[1
]}

Wong, Herbert ^{[1
]}

机构：

[1] Ind Res Ltd, Lower Hutt, New Zealand

来源：

INORGANICA CHIMICA ACTA | 2008年 / 361卷 / 07期

关键词：

methylamine borane; hydrogen storage; X-ray crystal structure; thermal analysis;

D O I：

10.1016/j.ica.2007.10.034

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The crystal structure of methylamine borane has been determined and contains parallel chains of dihydrogen-bonded CH(3)NH(2)BH(3) molecules. Thermal decomposition takes place from the melt (Delta H(fusion) = 8.5 kJ mol(-1)) and begins with the formation of an ionic borohydride. Hydrogen is liberated in two stages, at ca. 100 and 190 degrees C, with the observed rates during the first stage (Delta H = -25 kJ mol (-1), E(a) = 115 kJ mol(-1)) strongly dependent on temperature and time. cis- and trans-N-trimethylcyclotriborazane are formed during the first stage and subsequently cross-link to yield a non-volatile solid. Before this cross-linking, the system exhibited a high degree of volatility, with weight losses in excess of 80% observed in TG experiments using flowing gas. (C) 2007 Elsevier B.V. All rights reserved.

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页码：2147 / 2153

页数：7

相关论文

共 30 条

[1] VAPOR PRESSURES OF THE METHYLAMINE BORANES AND AMMONIA TRIBORANE [J].

ALTON, ER ;

BROWN, RD ;

CARTER, JC ;

TAYLOR, RC .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1959, 81 (14) :3550-3551

[2] Thermal decomposition of B-N-H compounds investigated by using combined thermoanalytical methods [J].

Baitalow, F ;

Baumann, J ;

Wolf, G ;

Jaenicke-Rössler, K ;

Leitner, G .

THERMOCHIMICA ACTA, 2002, 391 (1-2) :159-168

[3] INTERMEDIATES IN FORMATION OF N-METHYLAMINOBORANE TRIMER AND N,N-DIMETHYLAMINOBORANE DIMER [J].

BEACHLEY, OT .

INORGANIC CHEMISTRY, 1967, 6 (05) :870-&

[4] PREPARATION AND PROPERTIES OF TRIMERIC N-METHYL-AMINOBORANE [J].

BISSOT, TC ;

PARRY, RW .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1955, 77 (13) :3481-3482

[5] Amineborane-based chemical hydrogen storage: Enhanced ammonia borane dehydrogenation in ionic liquids [J].

Bluhm, Martin E. ;

Bradley, Mark G. ;

Butterick, Robert, III ;

Kusari, Upal ;

Sneddon, Larry G. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (24) :7748-7749

[6]

BOWDEN M, 2006, MAT RES SOC S P E, V927

[7] Room-temperature structure of ammonia borane [J].

Bowden, Mark E. ;

Gainsford, Graeme J. ;

Robinson, Ward T. .

AUSTRALIAN JOURNAL OF CHEMISTRY, 2007, 60 (03) :149-153

[8] STUDIES OF AMINOBORANES .2. PYROLYSIS OF MONOALKYLAMINEBORANES - SOME AMINOBORANE TRIMERS (1,3,5-TRIALKYLCYOCLOTRIBORAZANES) AND DIMERS [J].

BROWN, MP ;

HESELTINE, RW ;

SUTCLIFFE, LH .

JOURNAL OF THE CHEMICAL SOCIETY A -INORGANIC PHYSICAL THEORETICAL, 1968, (03) :612-+

[9] Dissociation and hydrolysis of ammonia-borane with solid acids and carbon dioxide: An efficient hydrogen generation system [J].

Chandra, Manish ;

Xu, Qiang .

JOURNAL OF POWER SOURCES, 2006, 159 (02) :855-860

[10] A new intermolecular interaction: Unconventional hydrogen bonds with element-hydride bonds as proton acceptor [J].

Crabtree, RH ;

Siegbahn, PEM ;

Eisenstein, O ;

Rheingold, AL .

ACCOUNTS OF CHEMICAL RESEARCH, 1996, 29 (07) :348-354